JP2010154669A - Power transmitter and method for testing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power transmitter and a method for testing the power transmitter, efficiently and reliably executing a test for the power transmitter in a noncontact power transmission system. <P>SOLUTION: The power transmitter 200 includes: a power transmission section 250, a power transmission controller 230, and a test register 216 as a test information setting section. When a first forcible power transmission mode is enabled based on the information set by the test register 216, the power transmission controller 230 controls the power transmission section 250 to continuously drive a primary coil L1 irrespective of the presence or absence of a reception side apparatus. When a second forcible power transmission mode is selected, matching of ID information is omitted in ID authentication processing, and the ID authentication information for reliably setting a power receiver 300 in a power receiving mode is transmitted to the power receiver 300, and a power transmitter 200 invalidates a parameter received from the power receiver 300 and uses a parameter prepared by the power transmitter to execute continuous power transmission. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power transmission device, a power transmission device testing method, and the like.

  In recent years, contactless power transmission (contactless power transmission) that uses electromagnetic induction and enables power transmission even without a metal part contact has been highlighted. Charging of telephones and household equipment (for example, a handset of a telephone) has been proposed. Such conventional technology of contactless power transmission is described in, for example, Patent Document 1.

The non-contact power transmission system of Patent Literature 1 includes a power transmission device (primary side module) and a power reception device (secondary side module). Moreover, in the non-contact power transmission system described in Patent Document 1, after performing ID authentication processing by transmitting and receiving an authentication code between the power transmission device and the power receiving device, and passing ID authentication, the power transmission device The primary coil is continuously driven to start normal power transmission to the power receiving apparatus.
JP 2006-60909 A

  In order to market a power transmission device, a manufacturer needs to perform various tests to ensure the performance, quality, reliability, safety, and the like of the power transmission device as a product. In addition, for example, it is necessary to pass a test such as electromagnetic compatibility (EMC) of a power transmission device, which is performed by a public certification body in each country.

  However, in the conventional technology, no consideration is given to the test of the power transmission device (primary side module) constituting the contactless power transmission system, and an efficient test of the power transmission device cannot be executed.

  For example, the power transmission device waits for the power receiving device to land, performs temporary power transmission, executes ID authentication processing with the power reception device, and passes ID authentication, and then continuously drives the primary coil (continuous power transmission). Execute. Therefore, in order for the power transmission device to start continuous power transmission, it is necessary to satisfy the two conditions that the power receiving device (power-receiving-side device) is arranged oppositely and that the ID authentication is passed. However, it makes the testing of power transmission equipment difficult.

  That is, it is desirable that the power transmission device test can be performed by the power transmission device alone, even if there is no power receiving side device. In addition, for example, it is desirable that the power transmission apparatus can be immediately put into a continuous power transmission state without any limitation.

  In the case where the power transmission device is tested in a state where the power transmission device and the power reception device are opposed to each other, for example, it is desirable that the power transmission device completes the authentication process as soon as possible and shifts to the continuous power transmission state. In addition, for example, it is desirable that the conditions for continuous power transmission can be freely determined on the power transmission device side without being restricted by the power receiving side device. In addition, for example, it is desirable that the ID authentication in the power receiving apparatus is reliably completed, and the power receiving apparatus always enters a power receiving mode in which continuous power transmission is received.

  According to some aspects of the present invention, it is possible to efficiently and reliably execute a power transmission device test. In addition, a necessary test can be performed more easily or with higher accuracy.

  (1) One aspect of the power transmission device of the present invention is a power transmission device for contactless power transmission, and includes a power transmission unit having a drive control circuit that controls driving of a primary coil, and controls the operation of the power transmission device. And a first forced power transmission mode setting unit for setting first switching information for switching enable / disable of the first forced power transmission mode, wherein the first forced power transmission mode is When disabled, the power transmission control device controls the drive control circuit in the power transmission unit to detect the landing of the power receiving side device in the standby phase before the landing of the power receiving side device is detected. When the first forced power transmission mode is enabled, the power transmission control device controls the drive control circuit in the power transmission unit to continuously drive the primary coil. .

  In this aspect, the first forced power transmission mode setting unit is provided in the power transmission device, thereby enabling forced continuous power transmission in the first forced power transmission mode. When the first forced power transmission mode is selected, even if the power receiving device is not provided, the power transmission device can be forced into the continuous power transmission state, and the power transmission device alone can be tested. In addition, when the first forced power transmission mode is selected, ID information with a power receiving device (the power receiving device may be attached integrally to the secondary device) provided in the secondary device, etc. The power transmission device in the standby state can be immediately shifted to the continuous power transmission state without exchanging. Therefore, the efficiency of the power transmission device test can be increased.

  Examples of power transmission device tests include power consumption measurement tests conducted by power transmission device manufacturers, transmission capability tests, temperature detection function confirmation tests, and tests for conformity and safety by public organizations (public certification tests). Etc. Specifically, the public certification test is, for example, an electromagnetic compatibility (EMC) test of a power transmission device.

  By setting the first switching information (forced power transmission mode setting information) for enabling the first forced power transmission mode in the first forced power transmission mode setting unit, the power transmission device can be set in the forced continuous power transmission state. . When the first forced power transmission mode is disabled, the power transmission device maintains a standby state. In the standby state, the power transmission device performs intermittent power transmission (for example, 0.3 seconds) for detecting the landing of the power receiving side device. 1 power transmission).

  The first forced power transmission mode setting unit can be configured using, for example, a writable memory (including a register). For example, the memory space of the memory is divided into a plurality of memory areas, and each divided memory area functions as a setting unit for determining (selecting) an operation mode, an operation condition, and the like for a test. Specifically, for example, whether the first forced power transmission mode is enabled / disabled is determined depending on whether switching information “1” or “0” is set in a predetermined bit of a predetermined address in the memory. it can.

  (2) Another aspect of the power transmission device of the present invention further includes a second forced power transmission mode setting unit for setting second switching information for switching enable / disable of the second forced power transmission mode, When the second forced power transmission mode is enabled, the power transmission control device controls the power transmission device when a landing of the power receiving device is detected, and a power receiving device provided in the power receiving device; An authentication process for exchanging authentication information between the power receiving apparatuses is executed. At the time of the authentication process, at least a part of the conformity confirmation process based on the authentication information transmitted from the power receiving apparatus is omitted, and the power receiving apparatus is securely connected. Authentication information for setting to the power receiving mode is transmitted to the power receiving device, and after the authentication processing, continuous power transmission based on operation information prepared on the power transmitting device side is executed.

  In this aspect, forced continuous power transmission in the second forced power transmission mode is enabled. The second forced power transmission mode can be used when the power transmission device is tested in a state where the power transmission device and the power reception device are arranged to face each other. For example, when testing the transmission capability of a power transmission device, it is necessary to continuously transmit power from the power transmission device to the power reception device and determine whether or not the load connected to the power reception device is supplied with power as expected. In this case, since it is a test for the transmission capability of the power transmission device, the accuracy of the authentication process between the power transmission device and the power reception device is not particularly problematic (for the accuracy of the authentication process, etc. separately) You just need to test). Therefore, in order to improve the efficiency of the transmission capability test of the power transmission device, it is desirable that the power transmission device complete the authentication process as soon as possible and shift to the continuous power transmission state.

  Therefore, when the second forced power transmission mode is selected, the power transmission device and the power reception device exchange authentication information, but the power transmission device performs the primary side (power transmission device) and the secondary side (based on the received authentication information). At least a part of the compatibility confirmation process with the power receiving apparatus) is omitted. When a plurality of processes are included in the conformity confirmation process, all of the processes can be omitted, or a part of the processes can be omitted (for example, there is a process that must be executed by all means). When that happens, you can run that process and skip other processes). Specifically, for example, the verification process of the received ID authentication information on the power receiving apparatus side and the ID authentication information prepared in advance in the power transmission apparatus can be omitted. This eliminates the need for time for conformity confirmation based on authentication information (including verification processing for ID information match confirmation) and shortens the time required for the standby power transmission device to shift to continuous power transmission. Can do.

  Further, during normal operation, when the performance of the power receiving apparatus becomes clear by exchanging ID authentication information or the like, the power transmission characteristics of the power transmitting apparatus are adjusted to match the performance of the power receiving apparatus. That is, the power transmission characteristics of the power transmission device are restricted based on information sent from the secondary side, and this is an obstacle in testing the power transmission device. That is, when conducting a test of the power transmission device, it is preferable that the power transmission characteristics of the power transmission device can be determined on the initiative of the power transmission device. Therefore, when the second forced power transmission mode is selected, the information received from the secondary side is ignored, and the continuous power transmission is executed based on the operation information prepared on the power transmission device side. Thereby, the power transmission characteristic of the power transmission device can be determined by the power transmission device side.

  Also, in the power receiving device, for example, if the ID authentication information received from the primary side cannot be confirmed, ID authentication fails, and in this case, the power transmitting device cannot start power transmission to the power receiving device. The transmission capability test of the power transmission device cannot be performed. Therefore, in order to prevent such a situation from occurring, when the second forced power transmission mode is selected, the power transmission device transmits authentication information for reliably setting the power reception device to the power reception mode. .

  “Authentication information for ensuring that the power receiving apparatus is in the power receiving mode” is, for example, ID information that allows the power receiving apparatus to perform ID authentication (that is, the authentication process in the power receiving apparatus is surely successful). For example, the power transmission device is prepared in advance. Further, instead of preparing the authentication information in the power transmission device in advance, the ID authentication information sent from the power receiving device may be sent back as it is. That is, since the power receiving apparatus always holds the ID information of its own device, the identity confirmation information returned from the power transmission device and the ID information held by the own device (ie, ID) If the matching is confirmed by collation of information), the match is surely confirmed and the ID authentication should be successful. As a result, when the second forced power transmission mode is selected, the ID authentication in the power receiving device is reliably completed, and the power receiving device always enters the power receiving mode in which continuous power transmission is received (that is, the power receiving device is surely connected). Power receiving mode). Therefore, a situation in which the test of the power transmission device cannot be continued due to the ID authentication failure on the power reception device side does not occur. In this way, it is possible to improve the efficiency of the test of the power transmission device performed in a state where the power transmission device and the power reception device face each other. Note that the above-described function of the power transmission device is also effective for an operation test of the power reception device.

  (3) Another aspect of the power transmission device of the present invention further includes a second forced power transmission mode setting unit for setting second switching information for switching enable / disable of the second forced power transmission mode, When the second forced power transmission mode is disabled, the power transmission control device controls the power transmission device when the landing of the power receiving device is detected, and the power receiving device provided in the power receiving device. A negotiation phase for executing a process for confirming the coincidence of ID information transmitted from the power receiving apparatus by exchanging the first information with the first information, exchanging the second information, and the second information A setup phase for executing an operation condition setting process based on the operation information transmitted from the power receiving device acquired by the information exchange, and When the second forced power transmission mode is enabled, the power transmission control device controls the power transmission device to execute the continuous power transmission based on the operation condition set in the setup phase, and the ID information in the negotiation phase The authentication information for ensuring that the power receiving device is in the power receiving mode is transmitted to the power receiving device, and the operation information transmitted from the power receiving device in the setup phase is transmitted. Instead, the operation condition setting process is executed based on the operation information prepared on the power transmission device side, and then continuous power transmission based on the operation condition set on the operation information prepared on the power transmission device side is performed. Let it run.

  In this aspect, the authentication information exchange process includes two stages of a negotiation phase and a setup phase. In the negotiation phase, for example, first information including ID information and safety information is exchanged. For example, conformity confirmation of a standard / coil / system is executed. In the setup phase, for example, confirmation of the corresponding function and exchange and setting of specific information for each application are executed. In the negotiation phase and setup phase, the primary side characteristics are matched to the secondary side characteristics to match the primary and secondary sides, and the primary side power transmission and secondary side power reception systems are prepared. This process has the meaning. If the primary side and the secondary side exchange information about the own device, whether the primary side or the secondary side is a device that is compatible with the own device based on information received from the other side. It is possible to confirm (i.e. authenticate). Accordingly, each piece of information handled in the negotiation phase and the setup phase can be said to be authentication information in a broad sense, and processing in each phase can be said to be authentication processing in a broad sense.

  When the second forced power transmission mode is disabled, normal power transmission (for example, continuous power transmission for supplying power to the secondary side load) is performed through two stages of the negotiation phase and the setup phase.

  When the second forced power transmission mode is enabled, ID information matching confirmation in the power transmission device is omitted in the negotiation phase. In addition, “authentication information for ensuring that the power receiving apparatus is in the power receiving mode” is transmitted to the power receiving apparatus. Therefore, a situation in which the test of the power transmission device cannot be continued due to the ID authentication failure on the power reception device side does not occur. In the setup phase, the power transmission device invalidates the operation information transmitted from the power receiving device under the control of the power transmission control device, and instead sets the operation condition based on the operation information prepared on the power transmission device side. The process is executed, and thereafter, continuous power transmission based on the operation condition set by the operation information prepared on the power transmission device side is executed. Thereby, the power transmission characteristic of the power transmission device can be determined by the power transmission device side. In this way, it is possible to improve the efficiency of the test of the power transmission device performed in a state where the power transmission device and the power reception device face each other. Note that the above-described function of the power transmission device is also effective for an operation test of the power reception device.

  (4) In another aspect of the power transmission device of the present invention, the authentication information for ensuring that the power reception device is in the power reception mode includes predetermined ID information that allows the power reception device to perform ID authentication. .

  As described above, the “authentication information for surely setting the power receiving device in the power receiving mode” is determined in advance, for example, so that the power receiving device can perform ID authentication (that is, the authentication processing in the power receiving device is surely successful). ID information can be used. The ID information can be prepared in advance in the power transmission device, for example.

  (5) In another aspect of the power transmission device of the present invention, the authentication information for ensuring that the power reception device is in the power reception mode includes ID information transmitted from the power reception device.

  As described above, for example, ID information transmitted from the power receiving device can be used as “authentication information for surely setting the power receiving device to the power receiving mode”. That is, since the power receiving apparatus always holds the ID information of its own device, if the identity verification information returned from the power transmitting device is matched with the ID information held by the own device, The ID authentication should be successful because the match is always confirmed. Therefore, the power receiving device (secondary module) can be reliably set to the power receiving mode.

  (6) In another aspect of the power transmission device of the present invention, the first forced power transmission mode setting unit or the second forced power transmission mode setting unit can be accessed from a device provided outside the power transmission device. .

  At the time of testing the power transmission device, for example, it is desirable that the test device or the like can mainly determine the conditions and lead the operation test of the power transmission device. Therefore, in this aspect, an external device can access the first forced power transmission mode setting unit or the second forced power transmission mode setting unit when testing the power transmission device or the like. The “external device” is, for example, a test device (tester) for a non-contact power transmission system, or a test condition generator dedicated to testing a power transmission device.

  In order to allow an external device to access the test information setting unit, an interface unit can be provided in the power transmission device. In addition, for example, it is also possible to provide a test dedicated terminal (test pin) on the power transmission device so that the operation mode setting information and the like can be directly written to the test information setting unit via the dedicated terminal. It is.

  (7) Another aspect of the power transmission device of the present invention includes a host interface for performing communication with a power transmission side host, and the power transmission side host transmits the first forced power transmission mode setting unit or the host interface via the host interface. The second forced power transmission mode setting unit can be accessed.

  By providing a host interface, a power transmission side host (for example, a host computer of a test device or a host device using a non-contact power transmission system) can be set by the first forced power transmission mode setting unit or the second forced power transmission mode setting. Can be accessed. As a result, the power transmission side host can lead the testing of the power transmission apparatus and the like.

  (8) In another aspect of the power transmission device of the present invention, the first forced power transmission mode setting unit or the second forced power transmission mode setting unit is provided in a test information setting unit in which information for testing the power transmission device is set. It is provided at a predetermined address, and an information bit as the first switching information or the second switching information is written to the first forced power transmission mode setting unit or the second forced power transmission mode setting unit, The enable / disable of the first forced power transmission mode or the second forced power transmission mode is switched.

  In this aspect, a test information setting unit in which information for testing the power transmission device is set is provided, and the first forced power transmission mode setting unit or the second forced power transmission mode setting unit is provided at a predetermined address in the test information setting unit. It is done. By providing the test information setting unit, setting of test conditions is facilitated. Information for testing can be written in the test information setting unit, and the test information setting unit can hold the written information. It is desirable that write access to the test information setting unit is permitted only when the test mode is selected, for example, in order to prevent erroneous condition setting. The test information setting unit can be configured by, for example, a test memory (for example, a test register). The test register is a memory having a relatively simple configuration. Adoption of the test register contributes to simplification and miniaturization of the configuration of the power transmission device, and also contributes to cost reduction.

  (9) Another aspect of the power transmission device of the present invention further includes a coil drive enable setting unit for setting third switching information for forcibly switching on / off of driving of the primary coil. .

  As described above, the first forced continuous power transmission mode enables forced continuous driving of the primary coil. However, in the power transmission device test, it is necessary to forcibly stop the driving of the primary coil. There is a case. For example, when measuring the power consumption of the power transmission device in the standby phase, the power consumption can be measured with higher reliability if the driving of the primary coil can be switched on / off. That is, the power transmission device during standby performs intermittent power transmission (for example, the primary coil is driven for 5 milliseconds every 0.3 seconds) in order to detect the landing of the power receiving device. The power consumption during standby can be known by measuring the average power during a predetermined time, but with the average power, the power consumption during the period when the coil is not driven (the period of 0.3 seconds in the above example) It cannot be measured separately from the power consumption during the period of driving (in the above example, the period of 5 msec), and the steady power consumption during each period cannot be measured.

  In this aspect, the coil drive can be forcibly turned on / off by setting coil drive on / off switching information in the coil drive enable setting unit. For example, when the first forced power transmission mode is enabled and the coil drive enable is on, the drive control circuit in the power transmission unit generates a drive clock for the primary coil based on the system clock, and the drive clock for the primary coil is the primary. The primary coil is continuously driven by being supplied to the coil driver. When the first forced power transmission mode is enabled and the coil drive enable is off, the system clock is continuously supplied to the circuit, but the generation of the drive clock for the primary coil or the supply to the driver is stopped, and the primary coil is stopped. Is forcibly stopped.

  Therefore, by selecting ON / OFF of the coil drive enable in the state where the first forced power transmission mode is enabled, the power consumption of the power transmission device during the period when the coil drive is not performed during standby and the coil drive are performed. It is possible to measure separately from the power consumption of the power transmission device during a certain period, and it is possible to measure the steady power consumption during each period. Therefore, more detailed power consumption measurement of the power transmission device in the standby phase is possible.

  (10) In another aspect of the power transmission device of the present invention, after the power-on reset of the power transmission device is released, at least a part of the power transmission control device before the reset release, the first forced power transmission mode setting unit and the The first switching information or the second switching information is set in at least one of the second forced power transmission mode setting units, and the transmission control is performed after the setting of the first switching information or the second switching information is completed. The reset of at least a part of the device is released.

  Write access to the first forced power transmission mode setting unit, the second forced power transmission mode setting unit, and the like is permitted only when the test mode is selected, for example, after the power-on reset is canceled. It can be performed in a period before the reset of at least a part of the power transmission control device (for example, a part related to the operation in the test mode) is released.

  The power-on reset is an operation in which the flip-flop is initialized by the power-on reset circuit because the operation of the flip-flop is not stable immediately after the power is turned on. The operation of the first forced power transmission mode setting unit and the second forced power transmission mode setting unit (that is, a test register or the like) is stabilized by the power-on reset. Therefore, the writing of information to the first forced power transmission mode setting unit and the second forced power transmission mode setting unit is executed after the power-on reset is canceled. However, when the first forced power transmission mode setting unit and the second forced power transmission mode setting unit are not in a reset state at the time of writing, if information is written to the first forced power transmission mode setting unit and the second forced power transmission mode setting unit At the same time, the power transmission apparatus may suddenly start to operate according to the written information. Therefore, in order to prevent such a situation, information writing to the first forced power transmission mode setting unit and the second forced power transmission mode setting unit is performed at least in part of the power transmission control device (for example, operation in the test mode). (Relevant parts) are reset. Then, after all the information settings are completed, the reset of the power transmission control device is cancelled. When the reset is released, the power transmission control device controls the power transmission device according to the information set in the test information setting unit (test register or the like), thereby executing power transmission under a desired condition.

  (11) Another aspect of the power transmission device of the present invention includes a reset signal input terminal for inputting a reset signal for resetting at least a part of the power transmission control device.

  Thereby, the power transmission control device can be reset at a desired timing. Therefore, necessary information can be set in the first forced power transmission mode setting unit, the second forced power transmission mode setting unit, and the like at a desired timing.

  (12) One aspect of the test method of the power transmission device of the present invention is that the first forced power transmission mode is enabled in a state where the power reception device is not disposed oppositely, and continuous oscillation of the primary coil is enabled. The primary coil drive is turned on / off by controlling the primary coil drive on / off by setting the third switching information in the coil drive enable setting unit, and the primary coil is turned on / off. The power consumption when the drive is on and the power consumption when the primary coil drive is off are measured.

  As described above, by selecting ON / OFF of the coil drive enable in the state where the first forced power transmission mode is enabled, the power consumption of the power transmission device during the period when the coil drive is not performed and the coil drive are It is possible to measure separately from the power consumption of the power transmission device during the period being used, and it is possible to measure the steady power consumption during each period. Therefore, more detailed power consumption measurement of the power transmission device in the standby phase is possible.

  (13) According to another aspect of the test method for a power transmission device of the present invention, the first forced power transmission mode is enabled and the primary coil is used for communication in a state where the power reception device is not disposed facing the communication frequency. The temperature detection function test is performed by continuously driving at a frequency close to the resonance frequency of the primary coil, and detecting a temperature increase due to heat generated by the continuous drive by a temperature detection unit provided in the power transmission device.

  The temperature detection function test is a test for determining whether or not the temperature detection function provided in the power transmission device functions normally. For example, when the temperature of a power transmission device exceeds a threshold value due to abnormal heat generation of the power transmission device, it is necessary to forcibly turn off the operation of the power transmission device to ensure safety. The apparatus is generally provided with a temperature detection function. The temperature detection function test can be performed, for example, by installing the power transmission device in a temperature test device in which the temperature can be freely set. In this case, the temperature test device is indispensable. The cost required increases.

  Therefore, in this aspect, the first forced power transmission mode is enabled, and the primary coil is continuously driven at a frequency closer to the resonance frequency of the primary coil than the communication frequency used for communication, and the temperature rises due to heat generated by the continuous drive. Is detected by a temperature detector provided in the power transmission device, and a temperature detection function test is performed. In a state where the primary coil is not electromagnetically coupled to the secondary coil, the drive amplitude of the primary coil increases due to the change in the resonance frequency, and the primary coil is connected at a frequency closer to the resonance frequency of the primary coil than the communication frequency. By driving, the drive amplitude of the primary coil can be further increased. Therefore, the temperature of the power transmission device can be increased in a short time. Therefore, the temperature detection function test of the power transmission device can be performed without using a special device.

  (14) According to another aspect of the power transmission device test method of the present invention, the second forced power transmission mode is enabled in a state where the power receiving device to which the load is connected is disposed oppositely, and after the authentication process, The load that continuously drives the primary coil, transmits electric power from the power transmitting device to the power receiving device via the primary coil and a secondary coil provided in the power receiving device, and is connected to the power receiving device. On the other hand, the transmission capability of the power transmission device is tested by determining whether or not the power supply is performed as expected.

  As described above, by using the second forced power transmission mode, when the transmission capability test of the power transmission device is performed with the power transmission device and the power reception device facing each other, the efficiency of the test can be improved.

  As described above, according to some aspects of the present invention, it is possible to efficiently and reliably execute the test of the power transmission device. In addition, a necessary test can be performed more easily or with higher accuracy.

  Next, embodiments of the present invention will be described with reference to the drawings. Note that the present embodiment described below does not unduly limit the contents of the present invention described in the claims, and all the configurations described in the present embodiment are as means for solving the present invention. It is not always essential.

(First embodiment)
In this embodiment, an example of a power transmission device test, and a configuration example and an operation example of a power transmission device having a first forced power transmission mode and a second forced power transmission mode will be described.

(Example of tests for power transmission equipment, etc.)
1A and 1B are diagrams illustrating an example of a test related to a power transmission device. FIG. 1A shows a test example of a power transmission device alone performed without providing a power receiving device, and FIG. 1B shows a test (opposite test) performed by arranging the power transmission device and the power receiving device facing each other. An example is shown.

  As shown in FIG. 1A, the test apparatus on the power transmission device side includes, for example, a host computer (power transmission side) 100 and a measuring instrument 110. The power transmission device (primary module) 200 is placed on a jig (not shown) provided in the measuring instrument 110, for example. The power transmission device 200 includes a host interface (host I / F) 204, a power transmission control device 230, and a primary coil L1. The host computer (power transmission side) 100 can send and receive control information and measurement data to and from the measuring instrument 110. Further, the host computer (power transmission side) 100 can set information for testing or the like in the power transmission apparatus 200 via the host interface 204. The contents of each test will be described later.

  Examples of tests for the power transmission device (primary module) 200 alone include a power consumption measurement test during standby, a temperature detection function test, and a public institution certification test.

  As shown in FIG. 1B, the test apparatus on the power receiving apparatus side includes, for example, a host computer (power receiving side) 400 and a measuring instrument 410. The power receiving device (secondary module) 300 is placed on a jig (not shown) provided in the measuring instrument 410, for example. The power receiving apparatus 300 includes a host interface (host I / F) 312, a power reception control apparatus 308, and a secondary coil L <b> 2 (not illustrated in FIG. 1B). The host computer (power receiving side) 400 can send and receive control information and measurement data to and from the measuring instrument 410. In addition, the host computer (power receiving side) 400 can transmit and receive information to and from the power receiving apparatus 300 via the host interface 312.

  As a test (opposite test) that is performed with the power transmission device (primary module) 200 and the power reception device (secondary module) 300 facing each other, for example, a transmission capability test of the power transmission device or a power reception device (secondary module) The test of 300 itself etc. The content of each test is mentioned later.

(Normal operation example of non-contact power transmission system)
Before describing the test of the power transmission device, a normal operation example of the contactless power transmission system will be described. FIG. 2 is a diagram illustrating a normal operation example of the non-contact power transmission system.

  In the standby state, the power transmission control device (not shown in FIG. 2) built in the power transmission side device (cradle) 500 sets the landing (setting) of the power reception side device (for example, mobile phone) 510 to 0.3 seconds, for example. Once detected (step S1), the landing of the power receiving device is detected (step S2). Note that the power transmission device 200 during standby drives the primary coil L1 intermittently in order to detect the landing of the power reception device 300. The primary coil L1 is driven by 5 milliseconds every 0.3 seconds, for example.

  Next, various types of information exchange (negotiation and setup) are executed between the power transmission device 200 and the power reception device 300 (step S3).

  In the negotiation phase, authentication information (including ID information) is exchanged, and a standard / coil / system conformity confirmation process (for example, a coincidence confirmation process by collating ID information) is performed based on the received authentication information. Executed. In the negotiation phase, safety information during temporary power transmission (for example, exchange of detection parameters for detecting foreign matter, etc.) is also executed.

  Specifically, the power transmission side and the power reception side exchange ID information, and confirm whether or not standards / coils / systems and the like are compatible with each other based on the received ID information. In addition, for example, the power receiving side transmits safety threshold information for foreign object detection or the like to the power transmission side, and performs safety information exchange. In this negotiation process, whether or not information communication is possible between the power transmission side and the power reception side, whether or not the communicated information is valid, and whether or not the load state on the power reception side is appropriate (foreign matter non-detection) Confirmation is also performed. In the negotiation process, when it is determined that the standards / coils / systems, etc. are inconsistent (non-conforming) as a result of the exchange of ID information, or a time-out error occurs, the power transmitting apparatus 200 shifts to the standby phase, for example. To do.

  The power transmission side and the power reception side shift to the setup phase after the negotiation phase. In this setup phase, a setup process is executed in which setup information such as information on the corresponding function and setting information for each application is transferred. For example, the transmission condition is specified based on the result of the negotiation process. Specifically, when the power receiving side transmits transmission condition information such as the coil driving voltage and driving frequency to the power transmission side, the power transmission side performs normal power transmission such as the coil driving voltage and driving frequency based on the received transmission condition information. Set the transmission conditions for. In addition, this setup process also exchanges information about supported functions and exchanges of setting information that differs for each higher-level application. Specifically, threshold information for load state detection on the power receiving side after the start of normal power transmission (for example, threshold information for data communication / foreign object detection), or in the command phase after normal power transmission, Information exchange regarding the types of commands that can be issued / executed by the power receiving side and additional corresponding functions such as a communication function and a periodic authentication function is executed in this setup process. This makes it possible to exchange different setting information according to the application such as the type of electronic device (mobile phone, audio device, etc.) and model.

  In the setup process, when removal of a device is detected or a timeout error occurs, for example, the process proceeds to a standby phase.

  The negotiation process and the setup process are processes for confirming compatibility in a broad sense between the power transmission side and the power reception side, and these can be collectively referred to as a broad sense authentication process. In this way, the negotiation process and the setup process confirm that the power receiving apparatus is an appropriate power transmission target, and after the necessary information is set, normal power transmission (here, for power supply to a load such as a battery) Continuous power transmission etc.) is started. When normal power transmission is started, an LED provided in the power receiving device (cellular phone) 510 is turned on.

  As illustrated in FIG. 2, when full charge of a battery or the like is detected during normal power transmission, a full charge notification is transmitted from the power receiving apparatus to the power transmission apparatus, and the power transmission apparatus that has received the notification stops normal power transmission. (Step S4). When normal power transmission is stopped, the LED provided in the power receiving device (cellular phone) 510 is turned off. And it transfers to the standby phase after full charge detection (step S5).

  In a standby state after full charge detection, for example, removal detection is executed once every 5 seconds, and confirmation of the necessity of recharging is executed once every 10 minutes. When the power receiving device (cellular phone) 510 is removed after full charge, the process returns to the initial standby phase (step S6). If it is determined that recharging is necessary after full charging, the process returns to step S3 (step S7). If the removal of the power receiving device (cellular phone) 510 is detected in the state of step 3, the apparatus returns to the initial standby state (step S8).

(Internal configuration example of power transmission device and power reception device)
FIG. 3 is a diagram illustrating an internal configuration example of the power transmission device and the power reception device. The power transmission device 200 is a primary module (a component of a contactless power transmission system) configured by mounting a plurality of circuit elements on a circuit board. The power transmission device 200 includes a primary coil L1, a system clock generation circuit (8 MHz oscillation circuit) 202 that generates a system clock SCK, a host interface 204, a test mode setting circuit 206, a register unit 207, and a temperature determination unit ( (Temperature abnormality detection unit) 218, power transmission control device (IC) 230, AFE (analog front end) 242 for monitoring the signal waveform at the coil end of the primary coil L1, load fluctuation on the secondary side and secondary A detection determination unit 244 that removes a side or detects a foreign object, a power transmission unit 250, and a system bus BUS1. The circuit board is provided with a plurality of signal terminals (P1 to P10). Further, at a predetermined location on the circuit board, at least one thermistor (temperature measuring device) 220 for monitoring the temperature is disposed. The temperature information output from the thermistor 220 is supplied to the temperature determination unit 218 via the signal terminal P7.

  The power transmission unit 250 includes a drive control circuit 252 that controls driving of the primary coil L1 and a coil drive circuit (driver) 254. The drive control circuit 252 divides the system clock SCK to generate a drive clock (driver clock) DRCK and supplies it to the coil drive circuit (driver) 254. In the present embodiment, by setting information in the test register 216, the supply of the drive clock DRCK to the coil drive circuit (driver) 254 can be forcibly stopped during the test (described later).

  The power transmission control device (IC) 230 includes a power transmission sequence control unit 232, a frequency modulation circuit 234, a main sequencer 236 that controls the overall operation of the power transmission device 200, a reception control / load demodulation circuit 238, and a periodic authentication determination. Circuit 240. Note that “periodic authentication” means, for example, that the secondary side periodically performs load modulation in order to detect that a foreign object has been inserted between the primary coil L1 and the secondary coil L2 during normal power transmission. This is an operation of transmitting a signal of a predetermined pattern to the primary side and periodically checking whether or not the primary side can detect the predetermined pattern.

  The register unit 207 stores a parameter 1 register 209 that stores a parameter 1 that is an operation parameter on the primary side, and a parameter register that stores a parameter 2 that is an operation parameter on the secondary side sent from the secondary side through information exchange. 210, a status register 211 that stores status related to communication, charging, etc., a command register 212 that stores communication commands, etc., a data register 213 that stores communication data, etc., and an interrupt that stores interrupt requests related to communication, charging, etc. A register 214 and a test register 216 as a test memory (test information setting unit) in which information for testing (bit information for determining a test mode and a test condition) is set.

  The test register 216 functions as a test information setting unit. The test register 216 as the test information setting unit has a first forced power transmission mode (force mode) setting unit (described later), and enables the first forced power transmission mode in the first forced power transmission mode setting unit. By setting the switching information, the power transmission device 200 can be in a forced continuous power transmission state. When the first forced power transmission mode is disabled, the power transmission device 200 maintains a standby state, and in the standby state, the power transmission device 200 detects intermittent power transmission (for example, 0. Power transmission once every 3 seconds).

  The test information setting unit can be configured by a writable memory. For example, the memory space of the memory is divided into a plurality of memory areas, and each divided memory area functions as a setting unit for determining (selecting) an operation mode, an operation condition, and the like for a test. Specifically, for example, the first forced power transmission mode (force mode) is enabled / disabled depending on whether switching information “1” or “0” is set in a predetermined bit of a predetermined address of the memory. Can be determined.

  More specifically, by setting information bits to predetermined bits at predetermined addresses in the test register 216, setting of test information (information specifying a test mode, test conditions, etc.) is realized. By configuring the test information setting unit with the test register 216, setting of test conditions is facilitated.

Note that the test register 216 is a storage device with a relatively simple configuration that can write information for testing and can hold the written information, for example. Further, it is desirable that write access to the test register 216 is permitted only when the test mode is selected by the test mode setting circuit 206 in order to prevent erroneous condition setting and the like. The test mode setting circuit 206 is supplied with a test mode signal (TEST) and a test mode clock (TMCK) via signal terminals P5 and P6.
The adoption of the test register 216 contributes to simplification and miniaturization of the configuration of the power transmission device 200, and also contributes to cost reduction.

  As described above, the power transmission device 200 includes the host interface 204 for communicating with the power transmission side host 100, and the power transmission side host 100 is connected to the test register 216 as a test information setting unit via the host interface 204. Can be accessed. By providing the host interface 204, a power transmission-side host (for example, a host computer of a test apparatus or a host apparatus using a non-contact power transmission system) 100 accesses the test register 216 to test modes and test conditions. Can be specified. As a result, the power transmission side host 100 can lead the test of the power transmission device 200.

  The power transmission side host 100 and the host interface 204 include an I2C interface capable of bidirectional communication by two-wire serial communication. In the I2C interface, an interrupt signal (XINT) supply line, a serial clock (SCL) supply line, and a serial data (SDA) supply line are used. Each line is pulled up to the power supply voltage VD1 via a pull-up resistor.

  In this embodiment, the power transmission side host 100 is configured to access the test register 216. However, the present invention is not limited to this, and an external device other than the power transmission side host can access the test register 216. You may do it. The “external device” is, for example, a test device (tester) for a non-contact power transmission system, or a test condition generator dedicated to testing a power transmission device. In order to allow an external device to access the test register 216, an interface unit can be provided in the power transmission device 200. Further, for example, it is also possible to provide a test dedicated terminal (test pin) in the power transmission device 200 so that the operation mode setting information and the like can be directly written to the test register 216 via the dedicated terminal. It is. As a result, for example, the test apparatus or the like can determine the conditions independently and can perform the operation test of the power transmission apparatus.

  3 is provided with a reset signal input terminal P4 for inputting a reset signal (pin reset signal) PNRS for resetting the power transmission control device (IC) 230. When the reset signal (pin reset signal) PNRS becomes active, the circuit located on the right side of the alternate long and short dash line in FIG. 3 is reset.

  Information for testing is written in the test register 216 as a test information setting unit in a period before reset of the power transmission control device 230 by reset signal (pin reset signal) PNRS after power-on reset of the power transmission device 200, and After the completion of the writing of the information for the test, the reset of the power transmission control device 230 by the reset signal (pin reset signal) PNRS is released.

  That is, for example, write access to the test register 216 is permitted only when the test mode is selected, and the write access is, for example, after the power-on reset is released and the reset of the power transmission control device is released. This can be done in the period before The power-on reset is an operation in which the flip-flop is initialized by the power-on reset circuit because the operation of the flip-flop is not stable immediately after the power is turned on.

  The operation of the test register 216 is stabilized by the power-on reset. In addition, at the same time that information is written to the test register 216, in order to prevent the power transmitting apparatus 200 from starting operation in accordance with the written information, the information for testing is written to the test register 216. 230 is performed in a reset state. Then, after all information settings are completed, the reset of the power transmission control device 230 is cancelled. When the reset is released, the power transmission control device controls the power transmission device 200 in accordance with the information set in the test register 216 after a predetermined period of time, whereby power transmission for a test under a desired condition is executed.

  Since the power transmission device 200 includes the reset signal input terminal P4 for resetting the power transmission control device 230, the power transmission control device 230 can be reset at a desired timing. Therefore, necessary information can be set in the test register 216 as the test information setting unit at a desired timing.

  3 includes a secondary coil L2, a power reception unit 302, a load modulation unit 304, and a power supply control unit 306 that controls power supply to the battery (load) 316. A power reception control device 308, a system bus BUS 2, a position / frequency detection circuit 310, a host interface 312, and a register unit 314. The power receiving side host 400 can perform bidirectional communication with the power receiving apparatus 300 via the host interface 312.

(Test register configuration example)
FIG. 4 is a diagram illustrating a configuration example of the test register. The memory area of the test register 216 is divided into addresses A to D. The memory area of each address is composed of 8 bits. The name of address A is default setting 1, the name of address B is default setting 2, the name of address C is test command setting 1, and the name of address D is test command setting 2.

  In FIG. 4, bit 7 of address A is set to enable / disable switching information (“1” or “0”) in the first forced power transmission mode (force mode). Therefore, bit 7 of address A functions as a first forced power transmission mode (force mode) setting unit. When the force mode bit is “1”, the first forced power transmission mode is enabled.

  Bits 3 to 6 of the address A are setting units that set the frequency value of the driving frequency F1 of the primary coil L1. Bits 4 to 6 of the address B are setting units for setting the frequency value of the driving frequency F2 of the primary coil L1. Bits 0 to 2 of the address B are setting units for setting the frequency value of the driving frequency F3 of the primary coil L1.

  The drive frequencies F1 and F2 are frequencies used for frequency modulation communication during normal power transmission. Further, the drive frequency F3 is a frequency used when detecting foreign matter, for example, and can be applied to a temperature detection function test. Therefore, the frequency value of the primary coil L1 is also determined by F1 and F2. A frequency value close to the resonance frequency is set.

  Bit 5 of address C is a setting unit for nego-on information, which is one piece of setting information for the second forced power transmission mode. Bit 6 of address C Bit 6 of the address C is a setup information setting unit which is one of the setting information of the second forced power transmission mode. When the force mode bit is “0”, the nego on bit is “0”, and the setup on bit is “0”, the second forced power transmission mode is enabled.

  Bit 4 of address C is a coil enable setting unit for setting driver on information (coil drive enable information) for forcibly setting whether or not primary coil L1 is driven (on / off). .

  Bits 1 to 7 of the address D are information setting units for designating the drive pattern of the primary coil L1. For example, continuous driving at the driving frequency F1, continuous driving at the driving frequency F2, continuous driving at the driving frequency F3, driving by frequency switching (FSK) between F1F2 based on the internally generated random code, based on a random code input from the outside Driving by frequency switching between F1F2 (FSK), driving by frequency switching (FSK) between F1F3 based on internally generated random code, driving by frequency switching (FSK) between F1F3 based on random code input from the outside, etc. It is possible to select (specify).

  FIG. 5 is a diagram for describing setting of the first forced power transmission mode and the second forced power transmission mode. As described above, when the force mode bit is “1”, the first forced power transmission mode is enabled. In addition, when the force mode bit is “0”, the nego on bit is “0”, and the setup on bit is “0”, the second forced power transmission mode is enabled. Further, when the force mode bit is “0”, the nego on bit is “1”, and the setup on bit is “1”, the mode is switched to the normal power transmission mode.

  In the test mode, the main sequencer 236 reads the bit information set in the test register 216 and executes a drive mode corresponding to the set bit information. That is, the main sequencer 236 sends a command to the power transmission sequence control unit 232, and the power transmission sequence control unit 232 outputs a control signal to the drive control circuit 252 in the power transmission unit 250. Thus, driving of the test primary coil L1 corresponding to the bit information set in the test register 216 is realized.

(Description of the first forced power transmission mode)
The first forced power transmission mode will be described with reference to FIG. FIG. 6 is a flowchart illustrating an example of an operation procedure of the power transmission device during the test. When the power is turned on (step S10), the power transmission device 200 starts temporary power transmission (intermittent power transmission) for detecting the landing of the secondary device (step S11), but the first forced power transmission mode is selected. If there is, the power transmission state continues indefinitely after provisional power transmission. That is, switching to continuous power transmission instead of intermittent power transmission (step S31), thereby realizing driving of the primary coil L1 in the first forced power transmission mode.

  That is, in the first forced power transmission mode, even if the power receiving device 300 is not provided, the power transmitting device 200 can be forcibly set to the continuous power transmission state, and the power transmission device 200 alone can be tested. In addition, when the first forced power transmission mode is selected, the ID between the power receiving device 300 provided in the secondary device (the power receiving device 300 may be integrally attached to the secondary device). The power transmission device 200 in the standby state can be immediately shifted to the continuous power transmission state without exchanging information or the like. Therefore, the efficiency of the test of the power transmission device 200 can be increased.

  Examples of the test of the power transmission device 200 include a power consumption measurement test, a transmission capability test and a temperature detection function confirmation test conducted by the manufacturer of the power transmission device 200, or a test of conformity and safety by a public organization (public certification) Test). Specifically, the public certification test is, for example, an electromagnetic compatibility (EMC) test of the power transmission device (the test content will be described later).

(Explanation about the second forced power transmission mode)
The second forced power transmission mode can be used when the power transmission device 200 is tested in a state where the power transmission device 200 and the power reception device 300 are arranged to face each other. In this case, the power transmission device 200 is shifted to the continuous power transmission mode as soon as possible through the authentication process, and the power reception device 300 is surely as fast and reliably as possible through the authentication process. It is important to move to In addition, when the power transmission device 200 is in the continuous power transmission mode, it is desirable that the primary side controls the continuous power transmission (primary side takes the lead).

  This will be specifically described below. For example, when testing the transmission capability of the power transmission device 200, whether or not power is continuously transmitted from the power transmission device 200 to the power reception device 300 and a load (battery 316 or the like) connected to the power reception device 300 is supplied as expected. It is necessary to judge. This test is a test for the transmission capability of the power transmission apparatus 200, and the accuracy of the ID authentication process between the power transmission apparatus 200 and the power reception apparatus 300 is not particularly problematic (about the accuracy of the ID authentication process). Can only be tested separately). Therefore, in order to improve the efficiency of the transmission capability test of the power transmission device 200, it is desirable that the power transmission device 200 complete the authentication process as soon as possible and shift to the continuous power transmission state.

  Therefore, when the second forced power transmission mode is selected, the power transmission device 200 and the power reception device 300 exchange authentication information, but the power transmission device is the primary side (power transmission device) 200 and 2 based on the received authentication information. Confirmation of compatibility with the next side (power receiving apparatus) 300 (that is, for example, verification processing of received ID authentication information on the power receiving apparatus side and ID authentication information prepared in advance in the power transmitting apparatus) is omitted. This eliminates the need for time for conformity confirmation based on authentication information (including verification processing for ID information match confirmation) and shortens the time required for the standby power transmission device to shift to continuous power transmission. Can do.

  Further, during normal operation, when the performance and the like of the power receiving device 300 are clarified by exchanging ID authentication information and the like, the power transmission characteristics of the power transmitting device 200 are adjusted to match the performance and the like of the power receiving device 300. That is, the power transmission characteristic of the power transmission device 200 is restricted based on information transmitted from the secondary side, and this is an obstacle in the test of the power transmission device 200. That is, when the test of the power transmission device 200 is performed, it is preferable that the power transmission characteristics of the power transmission device 200 can be determined independently by the power transmission device side. Therefore, when the second forced power transmission mode is selected, the information received from the secondary side is ignored, and the continuous power transmission is executed based on the operation information prepared on the power transmission device side. Thereby, the power transmission characteristic of the power transmission device 200 can be determined by the power transmission device side.

  In addition, in the power receiving apparatus 300, for example, if the ID authentication information received from the primary side cannot be confirmed, ID authentication fails. In this case, the power transmitting apparatus 200 can start power transmission to the power receiving apparatus 300. Therefore, the transmission capability test of the power transmission device 200 cannot be performed. Therefore, in order to prevent such a situation from occurring, when the second forced power transmission mode is selected, the power transmission device 300 performs authentication for reliably (or forcibly) setting the power reception device to the power reception mode. Information is transmitted to the power receiving apparatus.

  Here, the “authentication information for surely (or forcibly) setting the power receiving apparatus to the power receiving mode” is, for example, that the power receiving apparatus can perform ID authentication (that is, the authentication process in the power receiving apparatus is successful) The ID information is predetermined, and the ID information is prepared in advance in the power transmission device 200, for example. Instead of preparing the authentication information in the power transmission device 200 in advance, the ID authentication information sent from the power receiving device 300 may be sent back as it is.

  That is, since the power receiving apparatus 300 always holds the ID information of the own apparatus, the power receiving apparatus 300 confirms the coincidence between the ID authentication information returned from the power transmitting apparatus 200 and the ID information held by the own apparatus. If it is done, the match should be confirmed and ID authentication should succeed. Thereby, when the second forced power transmission mode is selected, the ID authentication in the power receiving device 300 is reliably completed, and the power receiving device 300 is surely and quickly put into a power receiving mode for receiving continuous power transmission (that is, The power receiving device is surely placed in the power receiving mode). Therefore, a situation in which the test of the power transmission device cannot be continued due to the ID authentication failure on the power reception device side does not occur.

  In this way, it is possible to improve the efficiency of the test of the power transmission device performed in a state where the power transmission device and the power reception device face each other. Note that the above-described function of the power transmission device is also effective for an operation test of the power reception device.

  Hereinafter, a specific operation procedure of the power transmission device 200 when the second forced power transmission mode is selected will be described with reference to FIG. In FIG. 6, the process of step S <b> 29 indicated by being surrounded by a thick dotted line is a process in the second forced power transmission mode.

  In FIG. 6, after temporary power transmission (step S <b> 11), the power transmission device 200 shifts to a continuous power transmission state through two stages of a negotiation phase and a setup phase (steps S <b> 12 to S <b> 17). Step S12 is a landing detection process, step S13 is a negotiation frame reception process, step S14 is a negotiation process, step S16 is a setup frame reception process, and step S17 is a setup process. Step S19 is a process for shifting to continuous power transmission after the setup process.

  In addition, when the power receiving apparatus 300 is turned on (step S20), the power receiving apparatus 300 transmits a nego frame (step S21), a setup frame (step S23), and the like.

  As described above, in the negotiation phase, for example, first information including ID information and safety information is exchanged, and, for example, conformity confirmation of a standard / coil / system is executed. In the setup phase, for example, confirmation of the corresponding function and exchange and setting of specific information for each application are executed.

  When the second forced power transmission mode is enabled, that is, when the negotiation on bit is “0” and the setup on bit is “0”, in the negotiation process (step S14), confirmation of conformity based on, for example, ID information in the power transmission device is omitted. The That is, in step S14, the ID information and the like transmitted from the power receiving apparatus 300 is stored as the parameter 2 in the parameter 2 register 210 (see FIG. 3) of the register unit 207, for example. However, the collation process with the primary original code is omitted. This eliminates the need for time for confirmation (matching confirmation) of the ID information, and shortens the time until the standby power transmission device shifts to continuous power transmission. Note that when there are a plurality of conformity confirmation processes, all of the plurality of processes can be omitted, and only a part of the plurality of processes can be omitted.

  In the setup process (step S17), the power transmitting apparatus 200 invalidates the operation information transmitted from the power receiving apparatus 300 under the control of the power transmission control apparatus 230, and whether or not the setup has been successfully completed (setup). OK) is not confirmed. Instead, operation condition setting processing is executed based on operation information prepared on the power transmission device side.

  After that, continuous power transmission based on the operation conditions set by the operation information prepared on the power transmission device side is executed (step S18). Thereby, the power transmission characteristic of the power transmission device 200 can be determined by the power transmission device side. In this way, it is possible to improve the efficiency of the power transmission device test performed in a state where the power transmission device 200 and the power reception device 300 face each other. Note that the function of the power transmission device 200 described above is also effective for an operation test of the power reception device 300 itself.

(Second Embodiment)
In the present embodiment, a process when the first forced power transmission mode is selected and a process when the second forced power transmission mode is selected will be described with reference to FIGS. 7 and 8. 7 and 8 are flowcharts for explaining specific processing when the first forced power transmission mode is selected and specific processing when the second forced power transmission mode is selected. 7 and 8, the processing flow on the primary side is shown on the left side, and the processing flow on the secondary side is shown on the right side.

  First, the processing flow of FIG. 7 will be described. The power transmission control device 230 controls the power transmission device 200 after waiting for k1 seconds (step S30) to start provisional power transmission at the frequency F1 (step S31), and then continues with the force mode bit (first forced power transmission mode). It is determined whether or not (bit) is “1” (step S32). If the force mode bit (first forced power transmission mode bit) is “1”, the power transmission control device 230 controls the power transmission device 200 and uses bits 3 to 1 of address D in the test register 216 (see FIG. 4). Forced continuous power transmission at the selected frequency is executed.

  After the secondary device landing detection (step S34), the power transmitting apparatus 200 receives the nego frame (step S35). The power transmission control device 230 determines whether or not the nego-on bit that is the second forced power transmission mode bit is “1” (step S36). When the nego-on bit is “1”, the ID information (nego information) acquired by the negotiation process is checked for coincidence (step S37). When the nego-on bit is “0”, the ID information acquired by the negotiation process ( Negotiation information) is omitted.

  Subsequently, the power transmission control device 230 confirms the position information of the primary device and the secondary device (step S38), and then confirms the presence or absence of a foreign object (step S39). When no foreign object is detected, the power transmission control device 230 controls the power transmission device 200 to transmit a nego frame (including standard / coil / system information) toward the secondary side (step S40).

  The ID information included in the nego frame transmitted in step S40 is authentication information for ensuring that the power receiving apparatus 300 is in the power receiving mode. As described above, the authentication information for surely setting the power receiving apparatus to the power receiving mode is determined in advance, for example, so that the power receiving apparatus 300 can perform ID authentication (that is, the authentication process in the power receiving apparatus 300 is surely successful). ID information, and the ID information is prepared in advance in the power transmission device 200, for example. Instead of preparing the authentication information in the power transmission device 200 in advance, the ID authentication information sent from the power receiving device 300 may be sent back as it is.

  Further, as illustrated on the right side of FIG. 7, the power receiving device 300 executes each process of Step S <b> 60 to Step S <b> 65. After a wait of k2 seconds (step S60), the power receiving apparatus 300 is turned on by receiving power (step S61). The power reception control device 308 turns off the load modulation transistor (step S62), performs position confirmation (step S63), controls the power reception device 300, and transmits the nego frame toward the power transmission device 200 (step S63). Step S64). Thereafter, the power receiving apparatus 300 receives the nego frame transmitted from the power transmitting apparatus 200 (step S65).

Next, the processing flow of FIG. 8 will be described. The power transmission device 200 receives the setup frame (step S41). The power transmission control device 230 determines whether or not the setup on bit is “1” (step S42). When the setup on bit is “1”, the power transmission control device 230 confirms whether or not the setup is properly completed. Performed (step S43), but when the setup on bit is “0”, the confirmation processing of step S42 is omitted (processing in the second forced power transmission mode (3)). Subsequently, the power transmission control device 230 controls the power transmission device 200 to transmit the setup frame toward the secondary side (step S44). Subsequently, the power transmission control device 230 performs position confirmation (step S45). Next, the power transmitting apparatus 200 receives the start frame transmitted from the secondary side (step S46).
Next, the power transmission control device 230 detects whether or not the nego on bit is “1” and the set on bit is “1” (that is, whether the second forced power transmission mode is disabled or enabled) ( Step S47). When the nego on bit is “1” and the set on bit is “1” (that is, when the second forced power transmission mode is disabled), the power transmission control device 230 controls the power transmission device 200 to perform normal power transmission ( The condition is switched to the condition for charging (step S48), periodic authentication is turned on (step S49), and normal power transmission (that is, continuous power transmission based on the parameter 2 received from the secondary side: for example, frequency F1) is started ( Step S50).
On the other hand, in step S47, when the nego on bit is “0” and the set on bit is “0” (that is, when the second forced power transmission mode is enabled), the power transmission control device 230 controls the power transmission device 200. Continuous power transmission (for example, frequency F1) under the primary side setting condition (that is, according to the condition determined by the parameter 1 unique to the primary side) is continued without setting a time limit (step S51). The process of step S47 and step S51 corresponds to the process (4) in the second forced power transmission mode. Subsequently, the power transmission control device 230 controls the power transmission device 200 to turn on periodic authentication (step S52).
In FIG. 8, the power receiving apparatus 300 confirms the negotiation frame (step S66), the position confirmation (step S67), the setup frame transmission (step S68), the setup frame reception (step S69), and the setup OK confirmation (step S69). Step S70), start frame transmission (step S71) and the like are executed.

(Third embodiment)
In the present embodiment, a standby power consumption measurement test, a temperature detection function test, a public institution certification test, a transmission capability test, and the like will be described.

(Power consumption test of power transmission equipment during standby)
In the power consumption test of the power transmitting device 200 during standby, the first forced power transmission mode is enabled in a state where the power receiving device 300 is not disposed oppositely, and the primary coil L1 can be continuously oscillated. Then, by setting information in the coil drive enable setting section (that is, setting the driver on bit in FIG. 4 to “1” or “0”), the drive of the primary coil L1 is turned on / off to drive the primary coil. The power consumption when on and the power consumption when the primary coil drive is off are measured.

  As described above, the first forced continuous power transmission mode enables forced continuous driving of the primary coil. However, in the test of the power transmission device 200, it is necessary to forcibly stop the driving of the primary coil. There is a case. That is, when measuring the power consumption of the power transmission device 200 in the standby phase, the power consumption can be measured with higher reliability if the driving of the primary coil L1 can be switched on / off. That is, the power transmission device 200 in standby mode performs intermittent power transmission (for example, the primary coil is driven for 5 milliseconds every 0.3 seconds) in order to detect the landing of the power receiving device. The power consumption during standby can be known by measuring the average power during a predetermined time, but with the average power, the power consumption during the period when the coil is not driven (the period of 0.3 seconds in the above example) It cannot be measured separately from the power consumption during the period of driving (in the above example, the period of 5 msec), and the steady power consumption during each period cannot be measured.

  However, according to the present embodiment, the coil drive is forcibly turned on / off by setting the coil drive on / off switching information (driver on bit) in the coil drive enable setting unit in the test register 216. can do. For example, when the first forced power transmission mode is enabled and the coil drive enable is on, the drive control circuit 252 in the power transmission unit 250 generates the drive clock DRCK of the primary coil based on the system clock SCK, and the drive clock DRCK is 1. The primary coil L1 is continuously driven by being supplied to the driver 254 of the secondary coil.

  Next, when the first forced power transmission mode is enabled and the coil drive enable is turned off, the supply of the system clock SCK to the circuit continues, but the generation of the drive clock DRCK of the primary coil L1 or the drive clock to the driver 254 The supply of DRCK is stopped and the driving of the primary coil L1 is forcibly stopped.

  Accordingly, in the state where the first forced power transmission mode is enabled, on / off of the coil drive enable is selected by setting the driver on bit in the test register 216, so that the coil drive is not performed during standby. The power consumption of the power transmission device can be measured separately from the power consumption of the power transmission device during the period in which the coil is driven, and the steady power consumption in each period can be measured. Therefore, more detailed power consumption measurement of the power transmission device in the standby phase is possible.

(Temperature detection function test)
In the temperature detection function test, the first forced power transmission mode is enabled in a state where the power receiving device 300 is not disposed oppositely, and the primary coil L1 is set at a frequency higher than the communication frequency (F1, F2) used for communication during normal power transmission. Continuous driving is performed at a frequency close to the resonance frequency of the primary coil L1. And the temperature rise by the heat_generation | fever by continuous drive is detected by the temperature detection part (for example, thermistor 220 of FIG. 3) provided in the power transmission apparatus 200, and a temperature detection function test is performed.

  The temperature detection function test is a test for determining whether or not the temperature detection function provided in the power transmission device 200 functions normally. For example, when the temperature of the power transmission device 200 exceeds a threshold value due to abnormal heat generation or the like of the power transmission device 200, it is necessary to forcibly turn off the operation of the power transmission device 200 to ensure safety. Therefore, the power transmission device 200 is generally provided with a temperature detection function. The temperature detection function test can be performed, for example, by installing the power transmission device 200 in a temperature test device in which the temperature can be freely set. In this case, the temperature test device is indispensable. The cost required for is increased.

  However, according to this embodiment, the first forced power transmission mode is enabled, and the primary coil is closer to the resonance frequency of the primary coil than the communication frequencies (F1, F2) used for communication during normal power transmission. The temperature detection function test can be performed by detecting a temperature rise due to heat generated by the continuous drive by a temperature detection unit (thermistor 220) provided in the power transmission device 200.

That is, in a state where the primary coil L1 is not electromagnetically coupled to the secondary coil L2, the drive amplitude of the primary coil L1 increases due to a change in the resonance frequency, and more than the communication frequency (frequency modulation frequencies F1, F2). By driving the primary coil L1 at a frequency closer to the resonance frequency of the primary coil, the drive amplitude of the primary coil L1 can be further increased. Therefore, the temperature of the power transmission device 200 can be increased to a high temperature in a short time. Therefore, the temperature detection function test of the power transmission device 200 can be performed without using a special device.
Here, the frequency F3 can be used as the continuous driving frequency for the temperature test. As described above with reference to FIG. 4, the primary coil L1 can be continuously driven at the frequency F3 by setting the information bit in the bit 3 of the address D of the test register 216. The frequency F3 is, for example, a foreign object detection frequency (for example, a frequency at which a phase change of a signal obtained from the primary coil can be manifested when a foreign object is inserted), and this F3 is 2 from the primary side. Since the frequency is closer to the resonance frequency of the primary coil than the frequencies F1 and F2 used for communication by frequency modulation to the secondary side, it can also be used for a temperature detection function test. However, the method for realizing continuous driving of the primary coil at a frequency closer to the resonance frequency of the primary coil is not limited to this. For example, as shown in FIG. 4, the frequency F1 is temporarily changed to a frequency closer to the resonance frequency by setting information bits in bits 6 to 3 of the address A of the test register 216, and the change is made. A method of using the later frequency F1 can also be executed.

(Transmission capability test of power transmission equipment)
In the transmission capability test of the power transmission device, the second forced power transmission mode is enabled in a state where the power receiving device 300 to which the load (battery 316) is connected is opposed, and through the authentication process (negotiation phase and setup phase). The primary coil L1 is continuously driven, power is transmitted from the power transmission apparatus to the power reception apparatus via the primary coil L1 and the secondary coil L2 provided in the power reception apparatus, and a load (battery 316) connected to the power reception apparatus is transmitted. ), The transmission capability of the power transmission device 200 is tested by determining whether or not the power supply is performed as expected. As described above, the transmission capability test can be efficiently performed by using the second forced power transmission mode.

(Certification test by public organization)
As a certification test conducted by public institutions in each country, for example, there is an EMC (Electro-Magnetic Compatibility) test of a power transmission device.

  The electromagnetic compatibility (EMC) of the power transmission device refers to the electromagnetic incoherence and resistance of the power transmission device 200. Electromagnetic incoherence is the cause of interference of other devices due to the operation of one device, or electromagnetic interference (EMI: Electro Magnetic Interference) that is a source of interference above a certain level that affects the human body. Say nothing.

  Electromagnetic immunity means having electromagnetic susceptibility (EMS: Electro Magnetic Susceptibility) that does not impede its operation by electromagnetic waves generated from nearby electrical equipment.

  When the EMC test of the power transmission device 200 is performed, the power transmission device 200 is placed on a turntable in an anechoic chamber, for example. In the anechoic chamber, radio waves radiated from the electronic device are not reflected by the wall surface, and intrusion of radio waves from the outside is blocked. Using this anechoic chamber, it is possible to effectively carry out electromagnetic shielding characteristics and immunity (resistance) tests.

  Specifically, the first forced power transmission mode is enabled in a state where the power receiving device 300 is not disposed oppositely, and the primary coil L1 is forcibly continuously driven at a desired drive frequency and drive pattern. Inspect the electromagnetic compatibility (EMC) of power transmission equipment. By using the first forced power transmission mode, an EMC test or the like can be performed efficiently.

  As described above, according to some embodiments of the present invention, it is possible to efficiently and reliably execute a power transmission device test. In addition, a necessary test can be performed more easily or with higher accuracy.

  In addition, although this embodiment was explained in full detail, it will be easily understood by those skilled in the art that many modifications can be made without departing from the novel matters and effects of the present invention. Therefore, all such modifications are included in the present invention.

1A and 1B are diagrams illustrating an example of a test related to a power transmission device. The figure which shows the normal operation example of the non-contact electric power transmission system The figure which shows the internal structural example of a power transmission apparatus and a power receiving apparatus Diagram showing a configuration example of the test register The figure for demonstrating the setting of 1st forced power transmission mode and 2nd forced power transmission mode FIG. 6 is a flowchart showing an example of an operation procedure of the power transmission device during the test. Flow chart for explaining specific processing when first forced power transmission mode is selected and specific processing when second forced power transmission mode is selected Flow chart for explaining specific processing when first forced power transmission mode is selected and specific processing when second forced power transmission mode is selected

Explanation of symbols

100 power transmission side host, 200 power transmission device (primary side module), L1 primary coil,
202 system clock generation circuit (8 MHz oscillation circuit),
204 host interface, 206 test mode setting circuit,
207 Register section (power transmission side), 216 test register,
218 Temperature determination unit (temperature abnormality detection unit), 220 Thermistor (temperature detection unit),
230 power transmission control device (IC), 232 power transmission sequence control unit,
234 frequency modulation circuit, 236 main sequencer,
238 reception control / load demodulation circuit, 240 periodic authentication judgment circuit,
242 AFE (analog front end), 244 detection determination unit, 250 power transmission unit,
BUS1 system bus, 252 drive control circuit,
254 Coil driving circuit (driver), 300 power receiving device, 302 power receiving unit,
304 load modulation unit, 306 power supply control unit, 308 power reception control device,
310 detection circuit, 312 host interface, 314 register unit (power receiving side),
400 Power receiving host

Claims (14)

A power transmission device for contactless power transmission,
A power transmission unit having a drive control circuit for controlling the drive of the primary coil;
A power transmission control device for controlling the operation of the power transmission device;
A first forced power transmission mode setting unit for setting first switching information for switching enable / disable of the first forced power transmission mode,
When the first forced power transmission mode is disabled, the power transmission control device controls the drive control circuit in the power transmission unit in the standby phase before the landing of the power receiving device is detected, and the power receiving side Execute intermittent power transmission to detect the landing of equipment,
When the first forced power transmission mode is enabled, the power transmission control device controls the drive control circuit in the power transmission unit to continuously drive the primary coil. The power transmission device according to claim 1,
A second forced power transmission mode setting unit for setting second switching information for switching enable / disable of the second forced power transmission mode;
When the second forced power transmission mode is enabled,
The power transmission control device includes:
When the landing of the power receiving device is detected, the power transmission device is controlled to perform authentication processing for exchanging authentication information with the power receiving device provided in the power receiving device,
At the time of the authentication process, at least a part of the conformity confirmation process based on the authentication information transmitted from the power receiving device is omitted, and authentication information for surely setting the power receiving device to the power receiving mode is provided to the power receiving device. Send
A power transmission apparatus that performs continuous power transmission based on operation information prepared on the power transmission apparatus side after the authentication process. The power transmission device according to claim 1,
A second forced power transmission mode setting unit for setting second switching information for switching enable / disable of the second forced power transmission mode;
When the second forced power transmission mode is disabled,
When the landing of the power receiving device is detected, the power transmission control device controls the power transmitting device to exchange first information with the power receiving device provided in the power receiving device, and A negotiation phase for executing a process for confirming the match of ID information transmitted from the power receiving device by exchanging the first information, and transmission from the power receiving device acquired by exchanging the second information and exchanging the second information. A setup phase for executing setting processing of the operating condition based on the operation information that has been performed, and thereafter, performing continuous power transmission based on the operating condition set in the setup phase,
When the second forced power transmission mode is enabled,
The power transmission control device controls the power transmission device so that the ID information matching confirmation process is omitted in the negotiation phase, and authentication information for ensuring that the power reception device is in a power reception mode is provided to the power reception device. Send
Further, in the setup phase, the operation information transmitted from the power receiving device is invalidated, and instead, the operation condition setting process is executed based on the operation information prepared on the power transmitting device side, and then the power transmitting device A power transmission apparatus that performs continuous power transmission based on the operation condition set by operation information prepared on the side. The power transmission device according to claim 3,
Authentication information for ensuring that the power receiving device is in a power receiving mode includes predetermined ID information that allows the power receiving device to perform ID authentication. The power transmission device according to claim 3 or claim 4,
ID information transmitted from the power receiving device is included in the authentication information for surely setting the power receiving device to the power receiving mode. The power transmission device according to any one of claims 1 to 5,
The first forced power transmission mode setting unit or the second forced power transmission mode setting unit can be accessed from a device provided outside the power transmission device. The power transmission device according to any one of claims 1 to 5,
A host interface for communicating with a power transmission side host, the power transmission side host being able to access the first forced power transmission mode setting unit or the second forced power transmission mode setting unit via the host interface; A power transmission device characterized by. The power transmission device according to any one of claims 1 to 7,
The first forced power transmission mode setting unit or the second forced power transmission mode setting unit is provided at a predetermined address in a test information setting unit in which information for testing a power transmission device is set, and the first forced power transmission mode An information bit as the first switching information or the second switching information is written in the setting unit or the second forced power transmission mode setting unit, so that the first forced power transmission mode or the second forced power transmission mode is set. A power transmission device which is enabled / disabled. The power transmission device according to any one of claims 1 to 8,
The power transmission device further comprising: a coil drive enable setting unit for setting third switching information for forcibly switching on / off of driving of the primary coil. A power transmission device according to any one of claims 1 to 9,
After the power-on reset of the power transmission device is released, at least one of the first forced power transmission mode setting unit and the second forced power transmission mode setting unit in the period before the reset cancellation of at least a part of the power transmission control device. Switching information or the second switching information is set, and after the setting of the first switching information or the second switching information is completed, reset of at least a part of the power transmission control device is released. A power transmission device. The power transmission device according to claim 10,
A power transmission device comprising a reset signal input terminal for inputting a reset signal for resetting at least a part of the power transmission control device. A test method for a power transmission device according to claim 9,
In a state where the power receiving device is not arranged oppositely, the first forced power transmission mode is enabled to enable continuous oscillation of the primary coil,
Further, on / off of driving of the primary coil is controlled by setting the third switching information in the coil driving enable setting unit, and the power consumption when the primary coil driving is on, the primary A method for testing a power transmission device, comprising: measuring power consumption when coil driving is off. A test method for a power transmission device according to any one of claims 1 to 11,
With the power receiving device not arranged oppositely, the first forced power transmission mode is enabled and the primary coil is continuously driven at a frequency closer to the resonance frequency of the primary coil than the communication frequency used for communication. ,
A test method for a power transmission device, wherein a temperature detection function test is performed by detecting a temperature rise due to heat generated by the continuous drive by a temperature detection unit provided in the power transmission device. A test method for a power transmission device according to claim 2,
With the power receiving device to which the load is connected facing each other, the second forced power transmission mode is enabled, and after the authentication process, the primary coil is continuously driven,
Power is transmitted from the power transmitting device to the power receiving device via the primary coil and a secondary coil provided in the power receiving device, and power is supplied as expected to the load connected to the power receiving device. A method for testing a power transmission device, comprising: testing a transmission capability of the power transmission device by determining whether or not the process is executed.

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