JP2010154670A - 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 (e.g., test by public certificate authority) for the power transmitter in a noncontact power transmission system. <P>SOLUTION: The power transmitter 200 includes: a power transmission part 250, a power transmission controller 230, and a test register 216 as a test information setting part. 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 part 250 to continuously drive a primary coil L1. At least either frequency information for driving the primary coil L1 or drive pattern information of the primary coil L1 can be set in the test register 216, thereby the frequency or driving pattern in continuous power transmission can be selected as required. <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 addition, since the power transmission device needs to comply with the radio laws and regulations of each country, in order to market the power transmission device, a test by a public certification body in each country (for example, tests related to the radio law, Measurement of effects on human exposure, tests related to the Electrical Appliance and Material Safety Law, and tests established by VCCI (Information-Technology Equipment and Radio Waves Voluntary Control Council).

  It is desirable that the power transmission frequency of the power transmission device can be freely set to all usable frequencies when testing by public certification bodies in each country. Moreover, it may be necessary to set the power transmission frequency pattern of the power transmission device to a pattern (for example, a random pattern) required by a public certification authority. Therefore, it is desirable to provide the power transmission device with a test function that can handle tests by public certification bodies in each country.

  According to some aspects of the present invention, a power transmission device test (for example, a test by a public certification body) can be efficiently and reliably performed.

  (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 test information setting unit for setting information necessary for testing the power transmission device, wherein the test information setting unit includes switching information of enable / disable of the first forced power transmission mode. A first forced power transmission mode setting unit for setting, and a coil drive mode setting unit for setting at least one of frequency information for driving the primary coil and drive pattern information for the primary coil, When the 1 forced power transmission mode is enabled, the power transmission control device controls the drive control circuit in the power transmission unit so that the primary coil is transmitted by the coil drive mode setting unit. It is continuously driven under the conditions determined.

  In this aspect, a test information setting unit is provided in the power transmission device. The test information setting unit includes a first forced power transmission mode setting unit for setting switching information of enable / disable of the first forced power transmission mode, frequency information for driving the primary coil, and driving of the primary coil. A coil drive mode setting unit for setting at least one of the pattern information.

  By enabling the first forced power transmission mode, regardless of the secondary device, the power transmission device alone can perform forced continuous power transmission, and the conditions for the continuous power transmission can be freely set. it can.

  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.

  In addition, selection of conditions for continuous power transmission is, for example, selecting which type of frequency to use when there are multiple types of usable frequencies, or, for example, determining the frequency value itself to be used. And, for example, to select a drive frequency pattern. The drive frequency pattern is, for example, a continuous power transmission pattern with a single frequency, a continuous power transmission pattern with a frequency switching method used during normal operation, a random frequency pattern with FSK (frequency shift keying) based on a random code (including pseudo-random code), etc. Etc.

  For example, when testing by a public certification body in each country, it is desirable that the transmission frequency of the power transmission device can be freely set to all available frequencies, and the transmission frequency pattern of the power transmission device can be set to a public certification body. However, the power transmission device of this aspect can flexibly respond to requests from public certification bodies in each country.

  (2) According to another aspect of the power transmission device of the present invention, a device provided outside the power transmission device has a communication interface for accessing the test information setting unit.

  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 test information 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, a communication interface unit is provided in the power transmission device. The communication interface also includes a dedicated test terminal (test pin) for directly writing operation mode setting information and the like to the test information setting unit.

  (3) Another aspect of the power transmission device of the present invention includes a host interface for communicating with a power transmission side host, and the power transmission side host accesses the test information setting unit via the host interface. Can do.

  By providing the host interface, 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) can access the test information setting unit. As a result, the power transmission side host can lead the testing of the power transmission apparatus and the like.

  (4) In another aspect of the power transmission device of the present invention, the test information setting unit includes a test register, and an information bit is written in a predetermined bit of a predetermined address in the test register, so that the test information setting unit Information setting is realized.

  By configuring the test information setting unit with a test register, setting of test conditions is facilitated. The test register is, for example, a storage device with a relatively simple configuration that can write information for a test and can hold the written information. Note that write access to the test register is preferably permitted only when the test mode is selected, for example, in order to prevent erroneous condition setting. Adoption of test register contributes to simplification and miniaturization of power transmission equipment configuration, and also contributes to cost reduction.

  (5) In another aspect of the power transmission device of the present invention, a continuous power transmission mode with any one of a plurality of usable frequencies is designated by the first setting in the coil drive mode setting unit.

  Thus, when performing continuous power transmission with a single frequency, it is possible to select a frequency to be actually used from among a plurality of usable frequencies.

  (6) In another aspect of the power transmission device of the present invention, continuous power transmission is performed while switching the coil drive frequency between a plurality of usable frequencies by frequency modulation based on a random code by the second setting in the coil drive mode setting unit. The frequency random continuous power transmission mode is designated.

  Thus, for example, the primary coil is driven with a drive clock having a random frequency switching pattern by FSK (frequency shift keying) based on random codes (including random data in a broad sense including PN codes, pseudo-random codes, etc.). be able to. Therefore, tests such as electromagnetic compatibility (EMC) of the power transmission device can be easily and accurately performed.

  (7) Another aspect of the power transmission device of the present invention includes a random code generation circuit that generates a random code.

  As a result, a random code can be generated inside the power transmission device, equipment for testing the power transmission device can be simplified, and an efficient test can be performed. In addition, the end user (the user of the electrical product in which the power transmission device is incorporated) can be easily tested.

  (8) Another aspect of the power transmission device of the present invention includes a random code input terminal for inputting a random code supplied from the outside of the power transmission device.

  The random code (random data) used at the time of the test may be different for each public certification body in each country, for example. Therefore, in this aspect, a random code input terminal is provided in the power transmission device so that a random code necessary for the test can be input from the outside. This enables a test using various random codes.

  (9) In another aspect of the power transmission apparatus of the present invention, the test information setting unit includes a frequency value setting unit for setting each frequency value of the plurality of usable frequencies.

  Thus, for example, the type of frequency to be used is selected by the coil drive mode setting unit, and the specific frequency value of the selected type of frequency is determined by the frequency setting unit (fine adjustment of the frequency) ), Etc., and more flexible and highly accurate testing is possible.

  (10) In another aspect of the power transmission device of the present invention, the coil drive mode setting unit in the test information setting unit includes a first coil drive mode setting unit that sets a continuous power transmission mode using a first frequency, and a second frequency. A second coil drive mode setting unit that sets a continuous power transmission mode according to the above, a third coil drive mode setting unit that sets a continuous power transmission mode at a third frequency, the first frequency and the second frequency, A fourth coil drive mode setting unit for setting a first frequency random continuous power transmission mode to be switched in accordance with a randomly generated code; and a random code supplied from the outside of the power transmission device for the first frequency and the second frequency. A fifth coil drive mode setting unit for setting the second frequency random continuous power transmission mode to be switched in accordance with the first frequency and the third frequency A sixth coil drive mode setting unit for setting a third frequency random continuous power transmission mode that switches according to a random code generated inside the power transmission device, and the first frequency and the third frequency are external to the power transmission device. A seventh coil drive mode setting unit that sets a frequency random continuous power transmission mode to be switched in accordance with a random code supplied from the first coil drive mode setting unit to the seventh coil drive mode setting unit The coil drive mode is determined by enabling any one of them.

  Accordingly, continuous power transmission using the first frequency, continuous power transmission using the second frequency, continuous power transmission using the third frequency, random continuous power transmission using an internally generated random code using the first and second frequencies, and the first and second frequencies. Random continuous power transmission with externally generated random code using Random, Random continuous power transmission with internally generated random code using 1st and 3rd frequency, with externally generated random code using 1st and 3rd frequency One of random continuous power transmission can be freely selected.

  (11) In another aspect of the power transmission device of the present invention, the first frequency and the second frequency are frequencies used for communication from the power transmission device to the power reception device, and the third frequency is the first frequency. The frequency is closer to the resonance frequency of the primary coil than the first frequency and the second frequency.

  The first frequency and the second frequency are, for example, frequencies used for communication by frequency modulation from the primary side to the secondary side during normal power transmission (continuous power transmission), and the third frequency is the first frequency and It is a frequency closer to the resonance frequency of the primary coil than each frequency of the second frequency. The third frequency F3 is, for example, a frequency used for foreign object detection, and a temperature detection function test (temperature detection is performed by a temperature detection unit provided in the power transmission device by causing a temperature rise by continuously oscillating the power transmission device. It can also be used for tests to evaluate properties.

  (12) Another aspect of the power transmission device of the present invention includes a reset signal input terminal for resetting the power transmission control device, and after the power-on reset of the power transmission device is released, Information is written to the test information setting unit in a period before reset release of at least a part of the power transmission control device, and after completion of the writing of the information, at least a part of the reset of the power transmission control device by the reset signal is released. The

  Write access to the test information setting unit is permitted only when, for example, the test mode is selected, and the write access is, for example, after the power-on reset is released and before the reset of the power transmission control device is released. Can be done in a period of time.

  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 power-on reset stabilizes the operation of the test information setting unit (test register or the like). In addition, at the same time that information is written to the test information setting unit (test register, etc.), the test information setting unit (test register, etc.) is tested to prevent the power transmission apparatus from starting operation according to the written information. Is written in a state where the power transmission control device is 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.

  Moreover, in this aspect, it has the reset signal input terminal for resetting a power transmission control apparatus. Thereby, the power transmission control device can be reset at a desired timing. Therefore, it is possible to set necessary information in the test information setting unit at a desired timing.

  (13) In one aspect of the power transmission device test method of the present invention, the first forced power transmission mode is enabled in a state where the power reception device is not disposed opposite to the power transmission device, and the primary coil is set by the coil drive mode setting unit. Forcibly and continuously drive at the determined drive frequency and drive pattern, thereby performing an electromagnetic environment compatibility test of the power transmission device.

  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 environment compatibility (EMC) of the power transmission device is, for example, electromagnetic incoherence and resistance included in the power transmission device 200. Electromagnetic non-interference is, for example, electromagnetic interference (EMI: Electro Magnetic Interference) that interferes with the operation of other devices when one device operates or becomes a source of interference above a certain level that affects the human body. That does not occur. Electromagnetic resistance refers to having electromagnetic sensitivity (EMS: Electro Magnetic Susceptibility) that does not hinder its own operation due to, for example, electromagnetic waves generated from nearby electrical equipment.

  When the EMC test of the power transmission device is performed, the power transmission device 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. For example, by using this anechoic chamber and utilizing the first forced power transmission mode and the setting function of the driving frequency and driving frequency pattern described above, the electromagnetic shielding characteristics and the immunity (resistance) test are effectively performed. Can do.

  As described above, according to some aspects of the present invention, it is possible to efficiently and reliably execute a power transmission device test (for example, a test by a public certification body).

  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.

  The present invention is particularly effective for a certification test by a public organization of a power transmission device, but the power transmission device of the present invention is provided with a useful function that can be used for other tests. Therefore, first, main functions for testing provided in the power transmission device, a configuration example of the power transmission device, and the like will be described, and then an authentication test by a public institution will be described.

(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. For example, standard / coil / system conformity confirmation processing is executed based on the received ID information and the like. Further, in the negotiation phase, exchange of safety information (for example, detection parameters for detecting foreign matter) is also performed.

  Specifically, the power transmission side and the power reception side exchange authentication information such as ID information, and based on the received authentication information (ID information etc.), whether or not the standards / coils / systems etc. are compatible with each other. Check. 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 or the like do not match as a result of the exchange of the authentication information (ID information, etc.) or a time-out error occurs, the power transmission device 200, for example, Migrate to

  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.

  Thus, the negotiation process and the setup process (these processes are processes for confirming (ie, authenticating) the adaptability of the other party based on the exchanged information. In a broad sense, it can be said that the power receiving device is an appropriate power transmission target, and after 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.

  In addition, a random code generation circuit 235 and a modulation signal selector 237 are provided so that the drive frequency and the drive frequency pattern can be changed. The circuit board is provided with a plurality of signal terminals (P1 to P12). The signal terminal P12 is a terminal for inputting an externally generated random code. The signal terminal P11 is a terminal (random pattern monitor terminal) for outputting a random code (random pattern, random data) as a modulation signal to the outside.

  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 normal mode 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 judgment circuit 240. Note that “periodic authentication” means that the secondary coil is periodically driven 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 for periodically determining whether or not a change in signal waveform due to driving of the secondary coil can be detected on the primary side.

  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 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 can perform two-way communication by two-wire serial communication. For example, an I2C interface is used. 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. This is performed in a state where at least a part of the circuit 230 is reset. Then, after all the information settings are completed, the reset of at least some of the circuits 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. The frequency value of the frequency F3 is set to a frequency value closer to the resonance frequency of the primary coil L1 than the frequencies F1 and F2 used for communication. 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). The temperature rise is caused by continuous oscillation, and can be used for a test for evaluating the temperature detection characteristic of the temperature detection unit provided in the power transmission device. During the temperature function test, by continuously driving the primary coil at the frequency F3 close to the resonance frequency, the drive amplitude can be increased and the ambient temperature can be increased efficiently.

  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. In FIG. 6, the process (step S27) indicated by being surrounded by a thick dotted line is a process corresponding to the first forced power transmission mode.

  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 S27), 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 collation processing for ID information matching confirmation), and shortens the time until the standby power transmission device shifts to continuous power transmission. be able to.

  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.

  Further, if the power receiving apparatus 300 cannot confirm the identity authentication information received from the primary side, the ID authentication fails. In this case, the power transmitting apparatus 200 cannot 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 supplies authentication information for forcibly setting the power reception device to the power reception mode to the power reception device. Send.

  Here, the “authentication information for forcing the power receiving apparatus into the power receiving mode” is determined in advance, for example, so that the power receiving apparatus can perform ID authentication (that is, the authentication process in the power receiving apparatus 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.

  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 apparatus is forcibly set to 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 S15 is a negotiation frame transmission process, and step 16 is a setup frame. This is a reception process, step S17 is a setup process, step S18 is a setup frame transmission process, and step S19 is a process of shifting to continuous power transmission after the setup process.

  Further, when the power receiving apparatus 300 is turned on (step S20), transmission of the negotiation frame (step S21), reception of the negotiation frame (step S22), transmission of the setup frame (step S23), and reception of the setup frame. (Step S24) and the like are executed.

  As described above, in the negotiation phase, for example, first information including ID information and safety information is exchanged, and, for example, a standard / coil / system matching check is performed. 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 matching of ID information in the power transmission device is omitted. That is, in step 14, 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. As a result, it is not necessary to have time for confirming the coincidence of the ID information, and it is possible to shorten the time until the standby power transmission apparatus shifts to continuous power transmission.

  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 S19). 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.

  Hereinafter, the process when the first forced power transmission mode is selected and the process when the second forced power transmission mode is selected will be specifically 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 to forcibly use the frequency F1 selected by bits 3 to 1 of the address D. Continuous power transmission is executed (processing in the first forced power transmission mode).

  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) obtained by the negotiation process is checked for coincidence (step S37). When the nego-on bit is “0”, the ID information obtained by the negotiation process ( Negotiation information) is not confirmed (second forced power transmission mode process (1)).

  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 forcibly setting the power receiving apparatus 300 to the power receiving mode (second forced power transmission mode process (2)). As described above, the authentication information for forcing the power receiving device into the power receiving mode is determined in advance, for example, so that the power receiving device 300 can perform ID authentication (that is, the authentication process in the power receiving device 300 is surely successful). 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 42 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 (frequency F1) according to the primary side setting condition (that is, according to the condition determined by the primary side specific parameter 1) is continued without setting a time limit (step S51). The processes in step S47 and step S51 correspond to the process (3) 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.

(Second Embodiment)
In this embodiment, a public institution certification test and the like will be described. 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 environment compatibility (EMC) of the power transmission device is, for example, electromagnetic incoherence and resistance included in the power transmission device 200. Electromagnetic non-interference is, for example, electromagnetic interference (EMI: Electro Magnetic Interference) that interferes with the operation of other devices when one device operates or becomes a source of interference above a certain level that affects the human body. That does not occur.

  Electromagnetic resistance refers to having electromagnetic sensitivity (EMS: Electro Magnetic Susceptibility) that does not hinder its own operation due to, for example, electromagnetic waves generated from nearby electrical equipment.

  FIG. 9 is a diagram illustrating an example of an electromagnetic environment compatibility (EMC) test of a power transmission device. As shown in FIG. 9, the power transmission device 200 is placed on a turntable 800 in an anechoic chamber EMCB, for example. In the anechoic chamber EMCB, the radio wave radiated from the power transmission device 200 is not reflected by the wall surface, and the penetration of the radio wave from the outside is blocked. The host (power transmission side) 100 sets the first forced power transmission mode bit (force mode bit) in the test register 216 in the power transmission apparatus 200 to enable the first forced power transmission mode. In addition, at least one of the drive frequency and drive pattern of the primary coil in continuous power transmission is appropriately designated by bit setting in the test register 216 by the host (power transmission side) 100.

Then, the first forced power transmission mode is enabled in a state where the power receiving device 300 is not opposed to the primary coil L1, and the primary coil L1 is forcibly continuously driven at a desired drive frequency and drive pattern. Inspect the equipment for electromagnetic compatibility (EMC). For example, an electromagnetic wave measuring device 810 is installed in the anechoic chamber EMCB, and thereby the level of unnecessary radiation (electromagnetic wave noise) is measured.
Moreover, when testing the immunity (resistance) of the power transmission apparatus 200, an electromagnetic noise source (not shown) is installed in at least one place in an electromagnetic anechoic chamber (EMCB), for example. Further, the host (power transmission side) 100 sets the first forced power transmission mode bit (force mode bit) in the test register 216 in the power transmission device 200 to enable the first forced power transmission mode. In addition, at least one of the drive frequency and drive pattern of the primary coil L1 in continuous power transmission is appropriately designated by the bit setting in the test register 216 by the host (power transmission side) 100. Then, continuous power transmission is started under the set conditions of the power transmission device 200, and in that state, electromagnetic wave noise is generated from the electromagnetic wave noise source, and for example, it is detected whether or not the operation of the power transmission device 200 is disturbed. . By repeating the same test while changing the drive frequency and drive pattern of the primary coil L1, it is possible to efficiently test the immunity (resistance) during operation of the power transmission device 200.

  Thus, by utilizing the first forced power transmission mode and the setting function of the drive frequency and the drive frequency pattern, the electromagnetic shield characteristics and the immunity (resistance) test can be effectively performed. In addition, the content of the certification test by a public organization is not limited to said content. For example, a certification test by a public institution can include an evaluation of the influence on the human body during the operation of the power transmission device, an evaluation of safety against foreign matters, and the like. Use of the power transmission device according to the present embodiment can flexibly and efficiently cope with various certification tests by public institutions.

  FIG. 10 is a diagram illustrating a configuration example of a portion related to the first forced power transmission mode and the setting function of the driving frequency and the driving frequency pattern of the power transmission device.

  During testing by public certification bodies in each country, it is desirable to be able to freely set the transmission frequency of the power transmission device to all available frequencies, and the public certification body requires the transmission frequency pattern of the power transmission device. It may be necessary to set a pattern (for example, a random pattern) to be performed. Therefore, in order to be able to change the drive frequency and the drive frequency pattern, a random code internal generation circuit 235, a modulation signal selector (test mode selector) 237, and the like are provided.

The drive control circuit 252 provided in the power transmission unit 250 includes an FSK modulation circuit 253 and an internal counter 255. The FSK modulation circuit 253 uses a modulation signal having a pattern of “1” and “0” to be supplied to drive a drive clock (driver clock) DRCK (drive clock before modulation) of a predetermined frequency (for example, frequency F1) as a modulated signal. ) Is modulated by FSK (frequency shift keying), whereby a modulated drive clock (driver clock) DRCK (modulated drive clock) is generated.
The internal counter 255 counts the drive clock DRCK and outputs a timing signal STG indicating a 1-bit break for every 128 DRCK. That is, the 1-bit length of the code is defined as a time corresponding to, for example, 128 driving clocks. Therefore, the drive clock DRCK is counted by the internal counter 255 to obtain the timing signal STG indicating the switching timing of “1” and “0” as the modulation signal, and the timing signal STG is used as the frequency modulation circuit (for the normal mode). 234 or random code internal generation circuit 235 needs to be supplied.
The timing signal STG becomes active every period corresponding to 128 drive clocks DRCK. Therefore, the frequency modulation circuit (for normal mode) 234 or the random code internal generation circuit 235 executes switching of “1” or “0” as the modulation signal in synchronization with the timing signal STG and continues this operation. By doing so, a modulation signal (test pattern) having a predetermined pattern can be generated.
Further, when a random code is supplied from the outside, it is necessary to supply a timing signal STG to an external random code generation circuit (not shown). Therefore, a terminal P13 for outputting the timing signal STG to the outside is provided.

  Further, a modulation signal selector (test mode selector) 237 is provided to switch the supply source of the “1” and “0” patterns as modulation signals supplied to the drive control circuit 2. Which source the “1” and “0” patterns from which the modulation signal selector (test mode selector) 237 selects is determined by information setting in the test register 216.

  As described above with reference to FIG. 4, the continuous power transmission mode using any one of a plurality of usable frequencies can be designated by setting information in the test register 216. In this case, the modulation signal selector (test mode selector) 237 continuously supplies only “1” or “0” to the drive control circuit 252.

  In addition, as described above, frequency random continuous power transmission in which continuous power transmission is performed while switching the coil drive frequency between a plurality of usable frequencies may be selected by frequency modulation based on a random code. In this case, for example, the primary coil L1 is driven by a drive clock DRCK having a random frequency switching pattern by FSK (frequency shift keying) based on random codes (including PN codes, pseudo-random codes, etc., random data in a broad sense). Can be driven. Therefore, tests such as electromagnetic compatibility (EMC) of the power transmission device can be easily and accurately performed.

  Further, by including the random code generation circuit 235 that generates a random code, a random code (S (RPT1) in FIG. 10) can be generated inside the power transmission device 200, and the power transmission device 200 can be tested. Equipment can be simplified and efficient testing can be performed. In addition, the end user (the user of the electrical product in which the power transmission device is incorporated) can be easily tested.

  In the configuration of FIG. 10, a random code input terminal P12 for inputting a random code (S (RPT2)) supplied from the outside of the power transmission apparatus 200 is provided. The random code (random data) used at the time of the test may be different for each public certification body in each country, for example. Therefore, a random code input terminal P12 is provided in the power transmission device so that a random code necessary for the test can be input from the outside. This enables a test using various random codes.

  Further, as described above with reference to FIG. 4, the frequency value of the drive frequency can be finely adjusted. Thereby, for example, it becomes possible to select the type of frequency to be used, and to determine a specific frequency value (finely adjust the frequency) of the selected type of frequency by the frequency setting unit, A more flexible and highly accurate test is possible.

  In addition, continuous power transmission using the first frequency F1, continuous power transmission using the second frequency F2, continuous power transmission using the third frequency F3, random continuous power transmission using an internally generated random code using the first frequency F1 and the second frequency F2, Random continuous power transmission using an externally generated random code using the first frequency F1 and the second frequency F2, Random continuous power transmission using an internally generated random code using the first frequency F1 and the third frequency F3, the first frequency F1 and Any one of random continuous power transmission using an externally generated random code using the third frequency F3 can be freely selected.

  FIG. 11A and FIG. 11B are diagrams showing an example of the configuration and operation of the random code internal generation circuit. The random code internal generation circuit 235 shown in FIG. 11A is constituted by a circuit that generates a pseudo random number having a periodicity called a “PN sequence (Pseudo-Random Number)”, for example. Specifically, the random code internal generation circuit 235 can be configured by a PN9 generation circuit, “PN9” is a code sequence with periodicity but is substantially a random number because of its long period. However, the present invention is not limited to this, and for example, a completely random code sequence can be used instead of a pseudo-random code sequence.

A random code internal generation circuit (PN9 generator) 235 shown in FIG. 11A includes a shift register including nine stages of D-type flip-flops (C1 to C9), and an exclusive OR circuit EOR1. And a circuit configuration having a feedback loop. Assuming that the number of stages of the shift register is n, n = 9, whereby the longest code sequence represented by L = 2 ⁿ −1 can be generated.

  For example, a code sequence such as “1100010011010011...” Can be generated as a random code sequence (pseudo-random code sequence). As described above, the drive control circuit 252 includes the FSK modulation circuit 253, and the FSK modulation circuit 253 uses the generated random code sequence (that is, the internally generated random code S (RPT1)) as a modulation signal. A clock signal of a predetermined frequency (for example, frequency F1) that is a modulated wave (AC carrier: generated by dividing the system clock, for example) is modulated by FSK (frequency shift keying), and thereby frequency-modulated. A drive clock (driver clock) DRCK is generated.

  As shown in FIG. 11B, the drive clock DRCK has the frequency F1 before the time t1, the frequency F2 (or F3) in the period from the time t1 to t2, and the frequency F1 in the period from the time t2 to t3. F2 (or F3) in the period from time t3 to t4, F1 in the period from time t4 to t5, F2 (or F3) in the period from time t5 to t6, and F1 in the period from time t6 to t7. F2 (or F3) in the period from time t7 to t8, F1 in the period from time t8 to t9, and F2 (or F3) after time t9. As described above, the 1-bit period TX corresponds to, for example, 128 DCLK. This 1-bit period can be appropriately changed by setting information in the test register 216.

  As described above, according to some embodiments of the present invention, a power transmission device test (for example, a test by a public certification body) can be efficiently and reliably performed.

  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 Diagram showing an example of electromagnetic compatibility (EMC) test for power transmission equipment The figure which shows the structural example of the part relevant to the setting function of the 1st forced power transmission mode and a drive frequency, or a drive frequency pattern of a power transmission apparatus. 11A and 11B are diagrams showing an example of the configuration and operation of a random code internal generation circuit.

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, 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, 235 random code internal generation circuit,
237 Modulation signal selector (test mode selector), 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 drive circuit (driver), 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 side host

Claims (13)

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 test information setting unit for setting information for testing the power transmission device,
The test information setting unit
A first forced power transmission mode setting unit for setting switching information of enable / disable of the first forced power transmission mode;
A coil drive mode setting unit that sets at least one of frequency information for driving the primary coil and drive pattern information of the primary coil;
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 under conditions determined by the coil drive mode setting unit. A power transmission device characterized in that The power transmission device according to claim 1,
An apparatus provided outside the power transmission apparatus includes a communication interface for accessing the test information setting unit. The power transmission device according to claim 1,
Has a host interface to communicate with the power transmission side host,
The power transmission apparatus is characterized in that the power transmission side host can access the test information setting unit via the host interface. The power transmission device according to any one of claims 1 to 3,
The test information setting unit includes a test register, and information setting for the test is realized by writing an information bit to a predetermined bit of a predetermined address in the test register. . The power transmission device according to any one of claims 1 to 4,
The power transmission apparatus according to claim 1, wherein a continuous power transmission mode using any one of a plurality of usable frequencies is designated by the first setting in the coil drive mode setting unit. The power transmission device according to any one of claims 1 to 4,
By the second setting in the coil drive mode setting unit, a frequency random continuous power transmission mode is specified in which continuous power transmission is performed while switching the coil drive frequency between a plurality of usable frequencies by frequency modulation based on a random code. Characteristic power transmission device. The power transmission device according to claim 6,
A power transmission apparatus comprising: a random code generation circuit that generates the random code. The power transmission device according to claim 6,
A power transmission device having a random code input terminal for inputting a random code supplied from the outside of the power transmission device. The power transmission device according to any one of claims 1 to 8,
The power transmission apparatus, wherein the test information setting unit includes a frequency value setting unit for setting each frequency value of the plurality of usable frequencies. The power transmission device according to claim 1,
The coil drive mode setting unit in the test information setting unit is
A first coil drive mode setting unit for setting a continuous power transmission mode with a first frequency;
A second coil drive mode setting unit for setting a continuous power transmission mode with a second frequency;
A third coil drive mode setting unit for setting a continuous power transmission mode with a third frequency;
A fourth coil drive mode setting unit for setting a first frequency random continuous power transmission mode for switching the first frequency and the second frequency according to a random code generated inside the power transmission device;
A fifth coil drive mode setting unit for setting a second frequency random continuous power transmission mode for switching the first frequency and the second frequency according to a random code supplied from the outside of the power transmission device;
A sixth coil drive mode setting unit for setting a third frequency random continuous power transmission mode for switching the first frequency and the third frequency according to a random code generated inside the power transmission device;
A seventh coil drive mode setting unit for setting a frequency random continuous power transmission mode for switching the first frequency and the third frequency according to a random code supplied from the outside of the power transmission device;
The power transmission apparatus according to claim 1, wherein the coil drive mode is determined by enabling any one of the first coil drive mode setting unit to the seventh coil drive mode setting unit. The power transmission device according to claim 10,
The first frequency and the second frequency are frequencies used for communication from the power transmission device to the power reception device,
The power transmission device, wherein the third frequency is closer to a resonance frequency of the primary coil than each of the first frequency and the second frequency. The power transmission device according to any one of claims 1 to 11,
A reset signal input terminal for resetting the power transmission control device;
Information is written to the test information setting unit after the power-on reset of the power transmission device is released and before at least a part of the power transmission control device is reset by the reset signal, and after the writing of the information is completed A reset of at least a part of the power transmission control device by the reset signal is canceled. A test method for a power transmission device according to any one of claims 1 to 12,
Enabling the first forced power transmission mode in a state where the power receiving device is not disposed oppositely, forcibly continuously driving the primary coil at a driving frequency and a driving pattern determined by the coil driving mode setting unit; A method for testing a power transmission device, comprising performing an electromagnetic compatibility test of the power transmission device.

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