JP2014180101A - Performance testing device for inverter and operation method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a testing system with a regeneration power supply capable of offering electric power of the characteristics of various batteries so that the type and characteristic of a battery to be connected with the inverter are not needed to be made different by adapting to the type and characteristic of an inverter subjected to performance testing.SOLUTION: The performance testing device for inverter comprises: a regeneration power supply electrically connected with an AC power supply; an inverter electrically connected with the regeneration power supply; a three-phase motor electrically connected with the inverter; and a flywheel mechanically connected with the three-phase motor. The regeneration power supply is an alternative power supply for battery regulated to an output obtained by simulating the characteristic and performance of a predetermined desired battery.

Description

  The present invention relates to an inverter performance test apparatus using a battery substitute regenerative power source that simulates the electrical characteristics of a battery and an operation method thereof.

  Electric vehicles (EV) and hybrid electric vehicles (HEV) have been proposed as countermeasures against resource energy depletion, but their practical application and popularization have been accelerated at present. One of the main driving power sources of electric vehicles and hybrid vehicles is a DC motor or an AC motor mounted on the vehicle.

  In order to drive a direct current motor or an alternating current motor which is a driving power source, a secondary battery such as a nickel metal hydride battery or a lithium ion battery is mounted on the vehicle together with the direct current motor or the alternating current motor as a power source for driving the motor. A control device for controlling the power supplied from the motor driving power source to the DC motor or the AC motor is also mounted on the vehicle.

  When the in-vehicle motor is an AC motor such as a synchronous motor or an induction motor, a control device including an inverter or the like that converts the DC voltage of the in-vehicle secondary battery into an AC voltage is mounted on the vehicle. Therefore, when conducting a drive test of an in-vehicle motor in advance before mounting on an actual vehicle, a drive battery is supplied from a drive control device having a configuration corresponding to the type of the in-vehicle motor using a secondary battery similar to the in-vehicle secondary battery as a power source. In-vehicle motor load tests that simulate actual driving conditions are performed.

  Further, the in-vehicle motor is generally driven by an engine and has a configuration of regenerative power that can act as a generator serving as a regenerative power source during deceleration or the like. Therefore, by supplying electric power from the in-vehicle secondary battery to the in-vehicle motor to simulate the running of the vehicle, when the charge amount of the in-vehicle secondary battery decreases, the motor is driven by the engine to operate as a generator, The vehicle-mounted secondary battery is charged with the power generated by the generator. In addition, means for calculating SOC (State of Charge) as one of the parameters representing the state of charge of the in-vehicle secondary battery has been proposed.

  For example, in Patent Document 1 below, when SOC = 100%, the secondary battery indicates a fully charged state, and when SOC = 0%, the secondary battery indicates a fully discharged state, and the open output voltage (E) of the secondary battery. Proposed SOC calculation method applied to in-vehicle secondary battery that calculates E = V + I × R based on the current (I) of the secondary battery and the internal resistance (R) that changes with the temperature of the secondary battery Has been.

  In Patent Document 2 below, as shown in FIG. 6, the rotation shafts of the first in-vehicle motor 6101 and the second in-vehicle motor 6102 are coupled by coupling or provided with a flywheel. The in-vehicle motor 6101 is connected to the output terminals U1, V1, W1 of the first inverter 6103, the second in-vehicle motor 6102 is connected to the output terminals U2, V2, W2 of the second inverter 6104, and the secondary battery or the like. A configuration in which input terminals P1, N1 of a first inverter 6103 and input terminals P2, N2 of a second inverter 6104 are connected in parallel to a direct current power source (DC) 6105 is disclosed. FIG. 6 is a conventional block diagram disclosed in Patent Document 2 for explaining a configuration aspect when an inverter is set in an inverter test apparatus.

  As shown in FIG. 6, a DC voltage from a DC power source (DC) 6105 is converted into an AC voltage by a first inverter 6103 and supplied to a first vehicle-mounted motor 6101, and the rotation of the first vehicle-mounted motor 6101 causes The second vehicle-mounted motor 6102 is operated as a generator.

  In addition, the AC voltage generated by the second vehicle-mounted motor 6102 is converted into a DC voltage by the second inverter 6104 and regenerated to the DC power source 6105 and the first inverter 6103. Alternatively, the DC voltage from the DC power source 6105 is converted into an AC voltage by the second inverter 6104 and supplied to the second vehicle-mounted motor 6102, and the first vehicle-mounted motor 6101 is generated by the rotation of the second vehicle-mounted motor 6102. Operate as a machine. Further, a test means for converting the AC voltage generated by the first vehicle-mounted motor 6101 into a DC voltage by the first inverter 6103 and regenerating it to the DC power source 6105 and the second inverter 6104 has been proposed.

  Further, in Patent Document 3 below, as shown in FIG. 7, the rotation shafts of a three-phase AC motor 7201 and a DC generator 7202 that can be applied as a vehicle-mounted motor are coupled, and a three-phase AC voltage from an AC power source 7207 is obtained. Then, full-wave rectification is performed by the regenerative power supply circuit 7206 that controls the transistor by the control unit, the output DC voltage is input to the inverter 7203, and is converted into a three-phase AC voltage by the inverter 7203 controlled by the drive output control circuit 7205. The three-phase AC voltage is supplied to the motor 7201, detection information such as the rotation speed of the motor 7201 is input to the control unit of the inverter 7203, the transistor is controlled by this control unit, and the drive output control circuit 7205 is instructed. The technical idea of outputting a three-phase AC voltage for driving the motor 7201 is disclosed. To have. FIG. 7 is a diagram illustrating a configuration example of a conventional motor driving device disclosed in Patent Document 3 below.

  As shown in FIG. 7, the electric power generated by a generator 7202 mechanically coupled to a motor 7201 is input to a boost converter 7204, boosted according to control from a drive output control circuit 7205, and converted into a DC voltage. The DC voltage is regenerated to the input side of the inverter 7203. When this regenerative power is large, it can be converted to an AC voltage by the regenerative power supply circuit 7206 and regenerated to the AC power supply 7207 side. Thus, a test means for reducing the running cost of the test of the motor 7201 has been proposed in Patent Document 2 below.

JP 2000-258513 A JP 2004-088832 A JP 2007-244022 A

  FIG. 8 is a block diagram for explaining an outline of a conventional system configuration in which a battery, an inverter, a three-phase motor, and a generator are connected, and an inverter performance test is performed by instructing an operation drive command to the inverter and the generator. It is.

  Conventionally, when performing an inverter performance test, a battery, an inverter, a three-phase motor, and a generator are connected as shown in FIG. And the performance test of the inverter was performed by instruct | indicating an operation drive command to an inverter and a generator.

  For this reason, it is necessary to prepare different types of batteries that are connected to the inverter for different types and characteristics, depending on the type and characteristics of the performance test target. The battery as a power source was not versatile.

  The present invention has been made in view of the above-described problems, and it is not necessary that the type and characteristics of the battery connected to the inverter differ depending on the type and characteristics of the inverter to be performance tested. Thus, it aims at realizing the test system provided with the regenerative power supply which can provide the electric power of the characteristic of various batteries.

  An inverter performance test apparatus according to the present invention includes a regenerative power source electrically connected to an AC power source, an inverter electrically connected to the regenerative power source, a three-phase motor electrically connected to the inverter, and a three-phase motor. And a flywheel mechanically connected to the motor, wherein the regenerative power source is a battery substitute power source that is adjusted to an output that simulates preset characteristics and performance of the desired battery.

  The operation method of the inverter performance test apparatus according to the present invention includes a regenerative power source electrically connected to an AC power source, an inverter electrically connected to the regenerative power source, and a three-phase electrically connected to the inverter. A regenerative power supply is a battery substitute power supply that is adjusted to an output that simulates the characteristics and performance of a desired battery set in advance, and is provided with a motor and a flywheel mechanically connected to a three-phase motor. And a control unit for controlling the operation of the regenerative power source. The control unit is configured to set a preset initial charging rate, an initial voltage, an initial current, and a charging rate. Based on the current capacity necessary for the change, the electrical characteristics at at least two charging rates, and the current measured by the measuring unit, the regeneration is performed so that the output corresponds to the calculated charging rate of the battery. In the inverter performance test apparatus for controlling the power source, the preset initial charging rate, initial voltage, initial current, current capacity necessary for changing the charging rate, and electrical characteristics at at least two charging rates are obtained. The step of taking in before the start of the test, the step of calculating the charging rate of the battery based on the current measured by the measuring unit during the test, and the electrical characteristics of the battery corresponding to the calculated charging rate of the battery And a step of operating the regenerative power source.

  A test with a regenerative power supply that can provide various battery characteristics so that the type and characteristics of the battery connected to the inverter do not have to be different according to the type and characteristics of the inverter to be performance tested. A system can be realized.

It is a block diagram explaining the system configuration | structure outline | summary of the regenerative power supply which simulates the battery characteristic and performance of this embodiment. It is a circuit diagram explaining the system configuration | structure of the regenerative power source which simulates the battery characteristic and performance to which the flywheel of this embodiment is connected. (A) is a flowchart explaining the start procedure required for the operation test of the inverter using the system of the regenerative power source that simulates the battery characteristics and performance connected to the flywheel according to the present embodiment, (b) It is a figure explaining the operation example with respect to the input parameter to the regenerative power supply operation control software using the system of the regenerative power supply which simulates the battery characteristic / performance connected to the flywheel according to the present embodiment. It is a figure explaining the typical example of the parameter inputted and set beforehand, in order to make the regenerative power supply input into regenerative power supply operation control software perform desired operation | movement. It is a flowchart explaining the procedure of the operation test of the inverter using the system of the regenerative power supply which simulates the battery characteristic and performance which connected the flywheel concerning this embodiment. It is the conventional block diagram currently disclosed by patent document 2 explaining the aspect of a structure when an inverter is set to an inverter test apparatus. It is a figure which shows the structural example of the conventional motor drive device currently disclosed by patent document 3. FIG. It is a block diagram explaining the conventional system structure outline | summary in which a battery, an inverter, a three-phase motor, and a generator are connected, and an inverter performance test is performed by instructing an operation drive command to the inverter and the generator.

  In the conventional inverter performance test, since the type of battery used differs depending on the type of inverter to be tested, it is necessary to prepare various batteries in advance according to the inverter, which takes time and effort. Therefore, the present embodiment proposes a technical concept relating to a test system in which the operation of a desired battery used for the performance test of the inverter is reflected in the operation of the regenerative power supply so that the performance of the battery is substituted by the regenerative power supply.

  As a result, as shown in FIG. 1, an inverter performance test equivalent to that using a desired battery can be performed without actually using a battery corresponding to the type of inverter to be tested. FIG. 1 is a block diagram illustrating an outline of a system configuration of a regenerative power source that simulates battery characteristics and performance of the present embodiment.

  As can be understood from FIG. 1, a regenerative power supply system 1000 that simulates desired battery characteristics and performance includes a regenerative power supply 200, regenerative power supply operation control software 100 that controls the operation of the regenerative power supply 200, and each part of the regenerative power supply 200. And a measuring instrument 300 that measures values necessary for control and monitoring of current and voltage of the device.

  The regenerative power supply operation control software 100 is installed in a computer or the like and executed. The regenerative power source 200 is connected to an AC power source (AC) 700 such as a 200 V commercial power source.

  A regenerative power supply system 1000 that simulates battery characteristics / performance includes an inverter 400 electrically connected to the regenerative power supply 200, a three-phase motor 500 electrically connected to the inverter 400, and a three-phase motor 500. A mechanically connected flywheel 600.

  The inverter 400 is controlled by a drive control unit 800 that controls the operation drive of the inverter 400. The flywheel 600 has a desired moment of inertia and can simulate various moments applied to the wheels of the vehicle, but since it is already known, it will not be described in detail here. By rotation of the flywheel 600, regenerative electric power can be generated in the three-phase motor 500, or conversely, electric power can be consumed.

  As shown in FIG. 1, a regenerative power supply system 1000 that simulates battery characteristics and performance does not include a battery that is conventionally electrically connected to an inverter 400, and the regenerative power supply 200 is electrically connected to the battery 400. Used as a substitute.

  In addition, the regenerative power source 200 includes an initial voltage value (V), an output current value (A), an internal resistance (R), a current capacity (Ah), and a charging rate that are input in advance using the regenerative power source operation control software 100. Based on the relationship, the output is adjusted so that the power supply has the same characteristics and performance as the actual desired battery.

  In other words, the regenerative power source 200 functions as a versatile power source having electrical characteristics equivalent to those of an appropriate battery that matches the characteristics of the inverter 400 to be tested.

  In response to the current supply request from the inverter 400, the regenerative power supply 200 supplies current and the like to the inverter 400 based on characteristics corresponding to the characteristics of the battery used at that time at that time.

  Conventionally, electrical characteristics such as a charge rate of a battery change with time according to the amount of charge and discharge and the passage of time such as spontaneous discharge. Therefore, the electrical characteristics of the power source battery including the battery voltage and current in the performance test of the inverter 400 change from moment to moment. However, the regenerative power source 200 in the present embodiment is The electric current etc. which simulated the above-mentioned characteristic change can be supplied.

  For this reason, the regenerative power supply operation control software 100 includes, as parameters inputted in advance, an initial charging rate indicating the performance of the battery to be substituted, a voltage for each charging rate, and a change from the initial charging rate to an arbitrary charging rate. It is preferable that the necessary current capacity is input at least before performing the test.

  For example, when the charging rate is 80% and when the charging rate is 90%, there are differences in electrical characteristics such as the voltage value and current value of an actual battery. For this reason, electrical characteristics corresponding to each charging rate are input to the regenerative power source operation control software 100 in advance.

  In addition, by inputting the current capacity necessary to change the charging rate from 80% to 90% in advance, the charging rate that changes with time according to the integrated amount of flowing current as the test progresses. The regenerative power source operation control software 100 calculates and the regenerative power source 200 can output the electrical characteristics corresponding to the calculated charging rate.

  Further, the regenerative power supply operation control software 100 is configured so that the regenerative power supply 200 is an actual desired battery based on a voltage, current, internal resistance, and current capacity necessary for changing the charge rate corresponding to a plurality of charge rates given in advance. Control to maintain the same characteristics as

  Therefore, the measuring instrument 300 may include a thermocouple capable of detecting temperature, and the regenerative power supply operation control software 100 may control the environment temperature to reflect the characteristics of the regenerative power supply 200.

  In addition, the battery has a voltage, etc., depending on the state of use, such as a so-called new product and a so-called in-use or aged product after multiple charge / discharge operations. It is known that the physical characteristics are different. For this reason, it is preferable to set the initial parameter corresponding to the usage state of the desired battery in the regenerative power supply operation control software 100 in an actual test.

  In order for the regenerative power supply operation control software 100 to perform more precise battery substitution control, the charge rate input in advance, the current value / voltage value corresponding to the charge rate, and the current required for the change in the charge rate The capacity is preferably input as many points as possible.

  For example, more accurate operation of the regenerative power supply 200 can be achieved by inputting in advance into the regenerative power supply operation control software 100 the electrical characteristics of the battery when the charging rate is changed by 1% between 80% and 90%. Make control feasible. However, for example, when only the electrical characteristics of the battery at two points of 80% and 90% are input in advance, the regenerative power supply operation control software 100 assumes that the characteristics change linearly between them, It is also possible to perform characteristic control.

  FIG. 2 is a circuit diagram illustrating the configuration of a regenerative power supply system 2000 that simulates the battery characteristics and performance to which the flywheel of this embodiment is connected. In FIG. 2, three-phase AC power 2200 is electrically connected to the input of the regenerative inverter 2100. The output of the regenerative inverter 2100 is electrically connected to the motor 2400 via the inverter 2300.

  The monitoring output of the motor 2400 is connected to the corresponding control terminal of the inverter 2300. The rotating shaft of the motor 2400 is mechanically connected to the flywheel 2500. Further, the corresponding output of the drive control unit 2600 is connected to the control terminal of the inverter 2300.

  Regenerative inverter 2100 includes control unit 2110, six transistors that operate as a three-phase full-wave rectifier circuit under the control unit 2110, and a capacitor 2120. Regenerative inverter 2100 includes six diodes corresponding to the collector-emitter of each of the six transistors. That is, as shown in FIG. 2, the cathodes and anodes of the six diodes are connected to the respective collectors and emitters of the six transistors, respectively.

  As can be understood from FIG. 2, the anode output of the regenerative inverter 2100 is connected to the collectors of the three transistors above the page of the inverter 2300. The cathode output of the regenerative inverter 2100 is connected to the emitters of the three transistors below the page of the inverter 2300. The corresponding outputs of the control unit 2310 of the inverter 2300 are connected to the bases of these six transistors.

  In FIG. 2, the emitter and collector connection nodes of the two transistors in the leftmost column of the inverter 2300 are connected to the first input terminal of the motor 2400. In FIG. 2, the emitter and collector connection nodes of the two transistors in the center row of the inverter 2300 are connected to the second input terminal of the motor 2400. In FIG. 2, the emitter and collector connection nodes of the two transistors in the rightmost column of the inverter 2300 are connected to the third input terminal of the motor 2400. Further, the monitoring output of the motor 2400 is connected to the control input of the control unit 2310 described above.

  Further, the flywheel 2500 is mechanically connected to the motor 2400, and the flywheel 2500 is rotated by the rotational force supplied from the motor 2400, or regenerative electric power is generated in the motor 2400 by the inertia moment of the flywheel 2500. Or

  In the configuration of the regenerative power supply system 2000 that simulates the battery characteristics and performance to which the flywheel shown in FIG. 2 is connected, the control unit 2110 is configured to perform the regenerative inverter 2100 3 in synchronization with the three-phase AC power described above. The current conduction angles of the three pairs of transistors described in the column are set to different angles by 120 degrees. Therefore, the three pairs of transistors described in the three columns of the regenerative inverter 2100 function as a three-phase full-wave rectifier circuit. The DC power obtained by such three-phase full-wave rectification is smoothed by the capacitor 2120 and supplied to the inverter 2300.

  In inverter 2300, control unit 2310 monitors the rotation angle of motor 2400 detected by a resolver (not shown) built in motor 2400. Further, the control unit 2310 uses two transistors of the inverter 2300 suitable for the motor 2400 to continue to rotate as an AC motor based on the instruction given by the drive control unit 2600 and the rotation angle of the motor 2400 being monitored. Only a pair of transistors consisting of is sequentially selected and set to an on state. Further, the instruction given by the drive control unit 2600 includes, for example, the rotational speed of the motor 2400, the degree of overload, and the like.

  Flywheel 2500 rotates like a wheel mounted on a vehicle when motor 2400 is driven by inverter 2300 as described above, and regenerative electric power is generated in motor 2400 by the moment of inertia during deceleration.

  Further, the drive control unit 2600 identifies a period during which the motor 2400 is braked while outputting the above instruction. Further, the drive control unit 2600 performs control in which the logical value is, for example, “1” during a period in which the rotation speed of the motor 2400 is maintained or is changed to a higher value, that is, a non-regenerative period (corresponding to vehicle acceleration). Output a signal.

  Further, during a period in which the number of revolutions of the motor 2400 is changed to a smaller value, that is, a regeneration period (corresponding to vehicle deceleration), the drive control unit 2600 sets the logical value of the control signal described above to, for example, “0”. . Further, the AC power (regenerative power) generated by the motor 2400 by the flywheel 2500 is regenerated with respect to both or one of the power source 2200 used for supplying the three-phase AC power and the output of the regenerative inverter 2100. .

  Further, the regeneration of the AC power with respect to the output of the regenerative inverter 2100 is, for example, a current formed between the capacitor 2120 via any two of the diodes of the regenerative inverter 2100 according to the phase of the line AC power. It is realized by the route.

  That is, in the configuration of the regenerative power supply system 2000 that simulates the battery characteristics and performance connected to the flywheel 2500 described above, the motor 2400 controls the regenerative inverter 2100 and the inverter 2300 under the drive control unit 2600 during the non-regenerative period. Driven through. Further, during the regeneration period, surplus rotational energy of the motor 2400 generated by the inertial rotation of the flywheel 2500 is converted into the regenerative AC power described above and regenerated.

  Therefore, the motor 2400 is efficiently driven, and the cost of the load test of not only the motor 2400 but also the inverter 2300 and the motor 2400 can be kept low. In addition, since the operation of the regenerative inverter 2100 is controlled by the regenerative inverter operation control software / measurement unit 2700 in the same manner as an actual battery, a wide variety of batteries need not be used.

  In addition, the procedure required for the operation test of the inverter according to the present invention is to input the performance of the battery to be used (initial charge rate, voltage for each charge rate, current capacity required for changing the charge rate) to the regenerative power supply operation control software. The regenerative power source and the inverter are connected, and then the inverter test is started, and it is not necessary to prepare various batteries.

  When the inverter is activated, the voltage and current corresponding to the initial charging rate input to the regenerative power supply operation control software are reflected in the operation of the regenerative power supply. During the test, the actual current flowing through the regenerative power source is measured, for example, by sampling for 10 milliseconds, and the charging rate is calculated and updated by calculating the current capacity during that period, for example, every 100 milliseconds.

  Until the inverter operation test is completed, the regenerative power supply operation control software repeatedly reflects the change in the charging rate and the value corresponding to the changed charging rate in the operation of the regenerative power supply. For this reason, the regenerative power source can output electrical characteristics based on the updated charging rate at all times during the test period, and a test equivalent to that using an actual battery is possible.

  As described above, in this embodiment, the battery used for the inverter performance test can be substituted with the regenerative power source. In addition, the input value can be changed freely and flexibly within the performance (current, voltage) range of the regenerative power supply, so that the performance of the substitute battery can be used in a wide range. Yes, it is highly versatile, and it can save the expense and labor of battery preparation, installation and new purchase due to battery consumption according to the performance of the inverter.

  Moreover, it is not necessary for the operator to control the load applied to the motor by using a flywheel instead of the conventional generator. In addition, the load on the motor can be adjusted by changing the moment of inertia of the flywheel. If the moment of inertia of the flywheel is changed, there are a variety of things from light cars to trucks and buses. An inverter test simulating a vehicle is possible.

  FIG. 3A is a flowchart for explaining a starting procedure necessary for an operation test of an inverter using a system 2000 of a regenerative power source that simulates battery characteristics and performance connected to a flywheel according to the present embodiment. FIG. 3B is a diagram for explaining an operation example with respect to input parameters to the regenerative power supply operation control software using the regenerative power supply system 2000 that simulates the battery characteristics and performance to which the flywheel according to the present embodiment is connected.

  As shown in FIG. 3A, the starting procedure required for the operation test of the inverter using the system of the regenerative power source that simulates the battery characteristics / performance connected to the flywheel according to the present embodiment is extremely easy and quick. It does not require the selection and preparation of a wide variety of complex batteries. Therefore, an inverter test start procedure will be described below for each step with reference to FIG. 1 and FIG.

(Step S3100)
A desired operation of the regenerative power supply is input to the regenerative power supply operation control software 100. That is, the operator inputs the relationship between the initial voltage value (V), the output current value (A), the internal resistance (R), the current capacity (Ah), and the charging rate to the regenerative power supply operation control software 100. The parameters entered are due to the charging / discharging of the battery, such as the initial charging rate that indicates the performance of the battery that you want to substitute, the voltage for each charging rate, and the current capacity required to change the desired charging rate from the initial charging rate. This value is necessary to calculate the characteristics of the battery that changes over time. Note that the measuring instrument 300 measures values necessary for calculating the characteristics of the battery that change with time as the test is performed, such as the discharge current amount and the regenerative current amount.

(Step S3200)
The operator electrically connects the regenerative power source 200 and the inverter 400.

(Step S3300)
The operator operates the inverter 400 by turning on a drive switch (not shown).

  Further, as shown in FIG. 3B, when using a regenerative power source 200 that simulates a battery between point A with a charging rate of 80% and point B with a charging rate of 90%, for example, the charging rate is It is preferable to input the electrical characteristics of the desired battery at each charging rate in advance as a parameter in increments of 1%. As a result, the regenerative power source 200 can perform an operation that more accurately reproduces an actual battery as shown by a solid line in FIG. 3B, for example.

  However, when the electrical characteristics of only two points, that is, point A with a charging rate of 80% and point B with a charging rate of 90%, are given in advance as parameters, one point is shown in FIG. As indicated by the chain line, the regenerative power supply operation control software 100 may operate the regenerative power supply 200 on the assumption that the electrical characteristics (eg, voltage value) change linearly between the points A and B. it can.

  FIG. 4 is a diagram illustrating a typical example of parameters that are input and set in advance so that the regenerative power source 200 that is input to the regenerative power source operation control software 100 performs a desired operation. FIG. 4 shows an example in which values of voltage (V), internal resistance (R), and current capacity (Ah) are set for every 10% when the SOC (charge rate) is 50% to 100%. However, it is not limited to the example shown in FIG. In FIG. 4, specific parameter values are not shown because they vary depending on the desired battery to be simulated.

  FIG. 5 is a flowchart for explaining the procedure of the inverter operation test using the system 1000 of the regenerative power source that simulates the battery characteristics / performance connected to the flywheel according to the present embodiment. In FIG. 5, only the part relevant to the operation of the regenerative power supply 200 for the battery substitute, which is a characteristic part of the present embodiment, is shown. The operation will be described below based on the steps shown in FIG.

(Step S5100)
The regenerative power supply operation control software 100 reads an initial charging rate preset by an operator.

(Step S5200)
The regenerative power source 200 generates a voltage corresponding to the read (initial) charge rate. The relationship between the charging rate and the voltage is set in advance as a parameter in the regenerative power supply operation control software 100 by the operator so as to be the same as the desired battery characteristics used in the test. If there is no corresponding value in the preset charging rate, the regenerative power supply operation control software 100 calculates the characteristic as a linear change before and after the value.

(Step S5300)
Measuring instrument 300 measures the actual current of regenerative power supply 200 with a sampling time of 10 milliseconds. The measured value is taken into the regenerative power supply operation control software 100 as needed. Since the regenerative power supply operation control software 100 is installed and executed in a computer or the like, it is imported into the computer.

(Step S5400)
The regenerative power supply operation control software 100 determines whether 100 milliseconds have elapsed. If 100 milliseconds have elapsed, the process proceeds to step S5500, and if 100 milliseconds have not elapsed, the process returns to step S5200. Actually, the computer on which the regenerative power supply operation control software 100 is executed determines whether 100 milliseconds have elapsed.

(Step S5500)
The regenerative power supply operation control software 100 calculates the current capacity during the 100 milliseconds. Note that a control unit (for example, a computer having a desired CPU) of the regenerative power source 200 that executes the regenerative power source operation control software 100 can perform this.

(Step S5600)
The regenerative power supply operation control software 100 calculates the current battery charge rate based on the current capacity charged or discharged for 100 milliseconds from the initial charge rate. It is assumed that the correspondence relationship among the initial charge rate, current capacity, and battery charge rate is given in advance by the operator. For example, when the initial charge rate is 95% and the current capacity 100Ah is charged as the charge amount, the battery electrical characteristics such as 99% charge rate are given in advance to the regenerative power source operation control software 100 by the operator. It shall be.

(Step S5700)
If the inverter test is terminated, this flow is terminated. If the inverter test is not terminated, the flow returns to step S5200.

  In the above-described embodiment, the regenerative power source is an output that simulates the characteristics and performance of various batteries. Therefore, it is easy to configure a regenerative power source that reflects the operation and performance of the battery that has been used in the past. Is possible. That is, the battery can be replaced with a regenerative power source.

  This not only eliminates the need for the operator to prepare a battery according to the type of inverter when performing the inverter test, but also eliminates the need to control the generator to load the motor. Arise.

  The system 1000 and the like of the regenerative power source that simulates the battery characteristics / performance exemplified in each of the above-described embodiments is not limited to the description in the embodiment, and is within the scope of the technical idea described in the embodiment and is obvious. The configuration, operation, operation method, and the like can be changed as appropriate. For convenience of explanation, the embodiments are individually described. However, the configurations of the embodiments may be applied in an appropriate combination, and the operations may be arranged in an appropriate combination.

  The regenerative power supply system for simulating the battery characteristics and performance of the present invention can be widely applied as a configuration of a test apparatus for various inverters.

  100 ·· Regenerative power supply operation control software, 200 ·· Regenerative power supply, 300 ·· Instrument, 400 ·· Inverter, 500 ·· Three-phase motor, 600 ·· Flywheel, 700 ·· AC power supply (AC), 800 · -Drive control unit, 1000-Regenerative power supply system that simulates battery characteristics and performance.

Claims (8)

A regenerative power source electrically connected to an AC power source;
An inverter electrically connected to the regenerative power source;
A three-phase motor electrically connected to the inverter;
A flywheel mechanically connected to the three-phase motor,
The inverter regenerative power supply is a battery substitute power supply that is adjusted to an output that simulates preset characteristics and performance of a desired battery. In the inverter performance test apparatus according to claim 1,
An inverter performance test apparatus comprising: a measuring unit that measures a discharge current and a regenerative current of the regenerative power source. The inverter performance test apparatus according to claim 2,
A control unit for controlling the operation of the regenerative power source;
The control unit measures the preset initial charging rate, initial voltage, initial current, current capacity necessary for changing the charging rate, electrical characteristics at at least two charging rates, and the measuring unit. The inverter performance test apparatus, wherein the regenerative power source is controlled so as to obtain an output corresponding to the calculated charging rate of the battery based on the current. In the inverter performance test apparatus according to any one of claims 1 to 3,
The regenerative power supply is a battery substitute power supply and does not include a separate battery. In the inverter performance test apparatus according to any one of claims 1 to 4,
The three-phase motor has a load adjusted by adjusting a moment of inertia of the flywheel. The operation method of the inverter performance test apparatus according to claim 3,
Capturing a pre-set initial charging rate, initial voltage, initial current, current capacity necessary for changing the charging rate, and electrical characteristics at at least two charging rates before starting the test;
A step of calculating the charge rate of the battery based on the current measured by the measurement unit while the test is in progress;
And a step of operating the regenerative power source with the electrical characteristics of the battery corresponding to the calculated charging rate of the battery.   A program for causing a control unit of an inverter performance test apparatus or a computer that controls the inverter performance test apparatus to execute each step of the operation method of the inverter performance test apparatus according to claim 6. A control unit or a computer-readable storage medium storing the program according to claim 7.

Images