JP2019110623A - Control unit for power converter - Google Patents

Abstract

To provide a control unit capable of preventing a battery mounted on a vehicle from reaching an excessive voltage owing to a generated current generated when a magnetic field winding type rotor with a magnet is in an unexcited state and in high rotation, and further minimizing a decrease in efficiency of electric power generation and driving operation.SOLUTION: A control unit for power converter is configured to: compare a generated current value by a rotary electric machine with a current threshold when a rotor is in an unexcited state; perform multi-phase short-circuiting of a first armature coil and a second armature coil when the generated current value is equal to or larger than the current threshold; perform multi-phase short-circuiting of one of the first armature coil and second armature coil when the generated current value is smaller than the current threshold and larger than 0; and put the first armature coil and second armature coil back into a normal state from the multi-phase short-circuited state.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a control device for a power converter incorporated in a generator motor that operates as an electric motor during engine startup and torque assist and operates as a generator after engine startup.

  A control device of a power converter incorporated in the generator motor is connected between the rotating electric machine and the battery and the vehicle electric load. Then, the control device of the power converter rectifies AC power output from the rotating electrical machine to convert it into DC power, and supplies the DC power after conversion to the battery and the vehicle electric load.

  In recent years, there has been an increasing demand for increasing the output current at the time of power generation and the output torque at the time of driving. As a technology to meet such a demand, there has been proposed a rotating electrical machine in which permanent magnets are provided between claw-like pole pieces in a so-called Lundell type rotor conventionally used in consumer vehicles (for example, Patent Literature 1).

  When there is a sudden load fluctuation such as the cable connecting between the generator motor and the battery being disconnected during power generation, the generated power temporarily becomes excessive, which corresponds to a high voltage at the input / output terminal of the generator motor Load dump surge may occur. In order to suppress such a load-dump surge, a method is proposed in which the armature winding is shorted by turning on all the switching elements of the negative side arm or the positive side arm of the bridge circuit (for example, Patent Document 2) reference).

  In addition, in the case of using a field winding type rotor with a magnet, a permanent magnet provided on the rotor passes in the vicinity of the stator magnetized by the back electromotive force generated at the time of a short circuit. Eddy currents occur in As a result, the permanent magnet may generate heat and demagnetize. Therefore, as a measure against this, a method has been proposed to reduce heat generation by simultaneously or multistage short-circuiting the first armature winding and the second armature winding simultaneously or in multiple stages according to the number of revolutions. (See, for example, Patent Document 3).

Patent No. 2548882 Patent No. 3840880 gazette Patent No. 6180601 gazette

However, the prior art has the following problems.
The conventional methods described in Patent Document 1 to Patent Document 3 can not detect overvoltage events other than load-dump surge until the battery voltage mounted on the vehicle becomes abnormal. For example, consider the case of using an armature power converter having a simple configuration in which field weakening control can not be performed on a generated current generated when the field winding type rotor with a magnet is in a non-excitation state and at a high rotation speed.

  An armature power converter etc. which perform energization control by a square wave are mentioned as an example of this. Such a conventional armature power converter can not cancel the induced voltage generated in the armature. For this reason, the conventional armature power converter can not cope until the generated current flows and, as a result, the battery becomes over voltage.

  Furthermore, patent documents 1-3 do not intend at all also about the reset procedure from an overvoltage state. For this reason, in the patent documents 1-3, if a polyphase short circuit state continues as it is, a switching element and an armature winding will generate heat. As a result, the efficiency at the time of subsequent power generation and driving may be reduced.

  The present invention was devised to solve the above-mentioned problems, and in the case where the field wound rotor with a magnet is in a non-excitation state and high rotation, the battery mounted on the vehicle leads to an overvoltage. It is an object of the present invention to provide a control device of a power converter which can prevent the following problems and can suppress the reduction of driving and power generation efficiency due to the heat generation thereafter.

  A control device for a power converter according to the present invention includes an armature having a first armature winding and a second armature winding, and a field winding type rotor with a magnet. Control device for a power converter including a controller for converting AC power output from the rotating electric machine into DC power and controlling the power converter for supplying power to the battery, the controller including a rotor In the non-excitation state, the generated current value by the rotating electrical machine is compared with the current threshold value preset to detect the state where the rotating electrical machine is in high rotation, and if the generated current value is equal to or greater than the current threshold, The first armature winding or the second armature winding or the second armature winding is multiphase shorted, and if the generated current value is less than the current threshold and greater than 0, the first armature winding or the second One of the two armature windings is shorted by polyphase, If the DENDEN flow value is not flowing, the first armature winding and a second armature winding is intended to return from the multiphase shorted state to the normal state.

  Further, a control device of a power converter according to the present invention includes an armature having a first armature winding and a second armature winding, and a rotor of a field winding type with a magnet. It is a control device of a power converter provided with a controller for controlling AC power output from a rotating electric machine to be converted into DC power and supplying power to a battery, wherein the controller In the non-excitation state, the detection result of the three-phase voltage of the first armature winding and the three-phase voltage of the second armature winding is acquired, and the time of one electrical cycle or more of the three-phase voltage is obtained In the set time width, calculate the maximum value of the three-phase voltage of either one of the three-phase voltage of the first armature winding or the three-phase voltage of the second armature winding, If the maximum value is equal to or more than the short circuit judgment value set in advance, one armature winding With the multiphase short-circuited and one of the armature windings shorted, the maximum value of the three-phase voltage of the other armature winding is calculated, and in the case where the maximum value is equal to or greater than the preset short circuit determination value Furthermore, with the other armature winding shorted to multiple phases and one armature winding shorted to multiple phases, any one phase negative arm of one armature winding is turned off To determine the peak value of the phase voltage, and when the peak value is less than the short circuit determination value, one armature winding is returned from the multiphase short circuit state to the normal state, and the other armature winding is The peak value of the phase voltage is determined by turning off the negative electrode side arm of any one phase of the other armature winding in the multiphase short-circuited state, and the peak value becomes less than the short circuit determination value. In this case, the other armature winding is returned from the multiphase short circuit state to the normal state.

  According to the present invention, according to the detection result of the generated current, it is possible to prevent the overvoltage of the battery by performing the treatment of performing the multiphase short circuit quickly, and return to the normal state when the treatment becomes unnecessary. ing. As a result, when the field winding type rotor with magnet is in the non-excitation state and high rotation, the battery mounted on the vehicle can be prevented from reaching an overvoltage, and the efficiency decline of the subsequent power generation and drive operation is also minimized. Can be limited.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows the vehicle system which mounts the generator motor concerning Embodiment 1 of this invention, and a structure of a generator motor. It is an outline drawing of a rotor incorporated in a dynamo-electric machine in Embodiment 1 of the present invention. It is the figure which showed the internal structure of the generator motor in Embodiment 1 of this invention. It is the figure which showed the internal structure of the control apparatus in Embodiment 1 of this invention. In Embodiment 1 of this invention, it is the figure which showed the generated current estimated value map used for the estimation process by a generated current estimation part. It is explanatory drawing which showed a series of control methods of multiphase short circuit control in Embodiment 1 of this invention. It is the figure which showed the internal structure of the control apparatus in Embodiment 2 of this invention. It is the figure which showed an example of the phase voltage peak detection by the electric power generation state determination part which concerns on Embodiment 2 of this invention. It is the flowchart which showed the series process performed by the electric power generation state determination part which concerns on Embodiment 2 of this invention.

  Hereinafter, preferred embodiments of a control device for a power converter of the present invention will be described using the drawings.

Embodiment 1
FIG. 1 is an explanatory view showing a configuration of a vehicle system equipped with a generator motor according to a first embodiment of the present invention and a generator motor. In FIG. 1, a generator motor 1 is connected to an internal combustion engine 3 via a power transmission means 4 such as a belt, for example. In addition, the generator motor 1 includes a B terminal which is a high potential side input / output terminal and an E terminal which is a low potential side input / output terminal. The B terminal is connected to the positive side terminal of the battery 2, and the E terminal is connected to the negative side terminal of the battery 2.

  The generator motor 1 is composed of a power converter 11 and a rotating electrical machine 12. The power converter 11 includes a field power conversion unit 112, an armature power conversion unit 113, a control device 111 corresponding to a controller that controls these power conversion units, and a field current sensor 114 for detecting a field current. And B terminal voltage sensor 115 for detecting the voltage of the B terminal, and a B terminal current detection sensor 116 for detecting the current flowing to the B terminal.

  The rotary electric machine 12 is configured to include a field winding 121 for passing a field current and generating a field magnetic flux, two sets of armature windings 122 and 123, and a position sensor 124. In addition, as the position sensor 124, a hall sensor, a resolver, etc. are generally used.

  Next, the outer shape of the rotor incorporated in the rotary electric machine 12 will be described. FIG. 2 is an outline view of a rotor incorporated in the rotary electric machine 12 according to Embodiment 1 of the present invention.

  The rotor shown in FIG. 2 is configured to include a rotor core provided with a plurality of positive pole-like pole piece 201 and a negative pole-like pole piece 202 on the outer periphery, and a permanent magnet 203. A field winding 121 is wound around the rotor core. The permanent magnet 203 is magnetized in a direction to reduce the leakage flux between the positive pole-like pole piece 201 and the negative pole-like pole piece 202 adjacent to each other. In the state where the field magnetic flux is generated in the field winding 121, the rotary electric machine 12 generates an induced voltage in the armature winding by the rotation of the rotor to generate electric power.

  The field power conversion unit 112 operates in response to a switching element on / off command from the control device 111. The control device 111 controls the switching elements of the field power conversion unit 112 by executing the PWM control to cause the field current to flow to the field winding 121. In the field power conversion unit 112, a half bridge circuit by a MOSFET is generally used.

  The armature power converter 113 operates in response to the gate signal from the controller 111. The armature power converter 113 rectifies an armature current flowing through the armature winding 122 and the armature winding 123 to generate power. The generated power is supplied to the battery and other vehicle electrical loads.

  FIG. 3 is a diagram showing an internal configuration of the generator motor 1 according to the first embodiment of the present invention. Armature power conversion unit 113 includes a three-phase bridge composed of legs 301 to 303 for three phases of U phase, V phase and W phase according to the configuration of the armature winding, and X phase, Y phase and It has a total of two circuits of a three-phase bridge composed of legs 304 to 306 for three phases of Z phase.

  Furthermore, the armature power conversion unit 113 includes UH 301a, VH 302a, and WH 303a as MOSFETs of the positive side arm of the armature winding 122, and UL 301b, VL 302b, and WL 303b as MOSFETs of the negative side arm of the armature winding 122. Have. Similarly, the armature power conversion unit 113 includes XH 304a, YH 305a, and ZH 306a as MOSFETs of the positive electrode side arm of the armature winding 123, and XL304b, YL 305b as MOSFETs of the negative electrode side arm of the armature winding 123. , ZL306b.

  These MOSFETs are turned on / off by gate signals from the controller 111, respectively. In addition, since this circuit configuration and the power generation method itself are well-known techniques, further detailed description will be omitted.

  Next, with reference to FIGS. 4 to 6, the operation at the time of detection of the generated current in the first embodiment will be described in detail. FIG. 4 is a diagram showing an internal configuration of the control device 111 according to Embodiment 1 of the present invention.

  The control device 111 shown in FIG. 4 includes a B terminal voltage detection unit 401, a rotation speed detection unit 402, a field current detection unit 403, a generated current estimation unit 404, a generated current threshold determination unit 405, and a negative arm side short circuit control unit 406. , And a gate driver 407 are configured.

B terminal voltage detection unit 401 detects the B terminal voltage _{V B.} The rotational speed detection unit 402 detects the rotational speed N. Field current detection unit 403 detects field current I _F. When the field winding 121 is in the non-excitation state and the rotor is in high rotation, the generated current estimation unit 404 uses the B terminal voltage V _B , the rotational speed N, and the field current I _F as a basis. , And estimate the generated current value I _GEN .

FIG. 5 is a diagram showing a generated current estimated value map used for the estimation process by the generated current estimation unit 404 in the first embodiment of the present invention. In the example shown in FIG. 5, it is assumed that the relationship between the designated value of the generated current and the rotational speed is mapped for each of a plurality of B terminal voltages V _B = V ₁ , V ₂ , V ₃ ,. It shows. If there is such a map is generated current estimator 404 based on the B terminal voltage V _B and the rotational speed N, with reference to the map, it is possible to obtain a power generation current estimated value.

Then, the generated current estimated value threshold determining unit 405, or the generated current value _{I GEN} threshold _{I TH} or more set in _advance, as well as determine less than _{I TH,} if the generated current value _{I GEN} is less than _{I TH} is Also, it is determined whether current is not flowing (I _GEN = 0). When it is determined in the generated current estimated value threshold value determination unit 405 that I _TH ≦ I _GEN , the negative electrode side arm short circuit control unit 406 controls the MOSFET of the negative electrode side arm of both the armature winding 122 and the armature winding 123. A command to turn on all of UL 301 b, VL 302 b, WL 303 b, XL 304 b, YL 305 b, and ZL 306 b, which are the above, is input to the gate driver 407.

In addition, when it is determined in the generated current estimated value threshold value determination unit 405 that 0 <I _GEN <I _TH , the negative electrode side arm short circuit control unit 406 controls the UL301 b which is the MOSFET of the negative electrode side arm of the armature winding 122. A command to turn on only one of the MOSFETs XL 304 b, YL 305 b and ZL 306 b, which are the negative side arms of the armature winding 123, is input to the gate driver 407.

FIG. 6 is an explanatory view showing a series of control methods of multiphase short circuit control according to the first embodiment of the present invention. 6 (a) shows the time change of the rotational speed N, FIG. 6 (b) shows the time change of the generated current estimated value, and FIG. 6 (c) shows the armature winding 122 and The on (short circuit) state / off (release) state of the MOSFET of the negative electrode side arm of the armature winding 123 is shown. FIG. 6 exemplifies the case where the MOSFET of the negative electrode side arm of the armature winding 122 is short-circuited when 0 <I _GEN <I _TH .

Further, when it is determined in the generated current estimated value threshold value determination unit 405 that I _GEN = 0 (no power generation), the negative electrode side arm short circuit control unit 406 includes both the armature winding 122 and the armature winding 123. A command to turn off all of the MOSFETs UL301b, VL302b, WL303b, XL304b, YL305b, and ZL306b, which are the MOSFETs on the negative side arm, is input to the gate driver 407.

  The gate driver 407 amplifies the command received from the negative electrode side arm short circuit control unit 406 to be a gate signal, and outputs a gate signal to drive the target MOSFET 408 on / off.

  When the armature winding 122 and the armature winding 123 are short-circuited in multiple phases, the actual generated current decreases. However, the generated current estimation unit 404 obtains the estimated generated current value with reference to the map created based on the output value at the time of normal power generation. For this reason, the MOSFET of the negative electrode side is not turned off unintentionally due to the decrease of the generated current at the time of the polyphase short circuit, and the polyphase short circuit is not released. Here, as an example of the decrease in the generated current at the time of the polyphase short circuit, there is a case where the generated current becomes zero at the same time as one of the armature windings is shorted by the polyphase.

  As described above, according to the first embodiment, even when the field winding is in the non-excitation state, when the generated current flows due to high rotation, many times before the battery reaches the overvoltage state. It is equipped with the composition which can perform phase short circuit. Therefore, the battery can be prevented in advance from reaching an overvoltage.

  When the MOSFET of the negative side arm is shorted by multiple phases, the magnetic flux generated by the rotor generates a reflux current in the armature winding and the MOSFET of the negative side arm, so that the relevant portion generates heat. With respect to such a problem, according to the first embodiment, control is performed such that multiphase short circuiting is performed in multiple stages in accordance with the estimated power generation amount, and the normal state (MOSFET all off) is restored when no power is generated. It has a configuration to do. As a result, the efficiency at the time of driving and power generation can be improved by heat generation reduction.

Second Embodiment
In the second embodiment, a specific example in which a method of detecting a generated current and a control method at the time of detection are different from the first embodiment will be described with reference to FIG.

  FIG. 7 is a diagram showing an internal configuration of the control device 111 according to the second embodiment of the present invention. The control device 111 shown in FIG. 7 includes a B terminal voltage detection unit 401, a negative electrode side arm short circuit control unit 406, a gate driver 407, a phase voltage detection unit 701, and a power generation state determination unit 702.

  The phase voltage detection unit 701 is a phase voltage between the middle point of each of the U-phase, V-phase, W-phase, X-phase, Y-phase and Z-phase legs 301 to 306 of two three-phase bridge circuits and GND. To detect. Here, the middle point means between the positive electrode side arm and the negative electrode side arm.

Power generation state determination unit 702 acquires B and the terminal voltage B terminal voltage V _B detected by the detector 401, the phase voltages detected by the phase voltage detecting unit 701. Next, specific processing by the power generation state determination unit 702 will be described using FIG. 8. FIG. 8 is a diagram showing an example of phase voltage peak detection by the power generation state determination unit 702 according to the second embodiment of the present invention.

The power generation state determination unit 702 sets the peak values V _{P _ U} , V _{P _} V, and V _{P _ W} of the phase voltages on the armature winding 122 side within the preset time T _{GET _ PEAK} at predetermined intervals as shown in FIG. The maximum value is calculated as _{VP1_MAX} . Similarly, power generation state determination unit 702 sets the maximum value among peak values _{VP_X} , _{VP_Y} and _{VP_Z} of the phase voltages on the armature winding 123 side in time T _{GET_PEAK for} one cycle as _{VP2_MAX.} calculate.

Further, the power generation state determination unit 702 generates a multiphase short circuit pattern based on the calculated maximum value _{VP1_MAX} and maximum value _{VP2_MAX} . At this time, T _{GET — PEAK} needs to be set in advance as a time at least one electrical angle cycle of the phase voltage.

  Next, the determination and operation flow of the power generation state determination unit 702 according to the second embodiment will be described in detail. FIG. 9 is a flowchart showing a series of processes performed by the power generation state determination unit 702 according to the second embodiment of the present invention. The flowchart shown in FIG. 9 is roughly divided into a multiphase short circuit determination process flow, a multiphase short circuit process flow, and a return process flow.

  First, in steps S 911 and S 912 of the multiphase short circuit determination process flow, the power generation state determination unit 702 confirms whether or not the armature winding 122 and the armature winding 123 are multiphase shorted. When the armature winding 123 is shorted in multiple phases, the power generation state determination unit 702 executes the process after step S 931 in the return process flow.

  Further, when the armature winding 123 is not short-circuited in multiple phases but the armature winding 122 is short-circuited in multiple phases, the power generation state determination unit 702 determines whether or not step S921 and subsequent steps in the multiple-phase shorting process flow. Execute the process In addition, when the armature winding 123 is not short-circuited in multiple phases and the armature winding 122 is not short-circuited in multiple phases, the power generation state determination unit 702 performs step S923 in the flow of the multiple-phase shorting process. Execute the following processing.

The case where the process proceeds to step S 923 in the multiphase short circuit processing flow corresponds to the case where both of the armature winding 122 and the armature winding 123 are not multiphase shorted. Therefore, in step S923, the power generation state determination unit 702 determines whether the condition of the following formula (1) is satisfied.
V _{P1_MAX} V V _B + V _F [V] (1)

  Then, when the condition of the above equation (1) is satisfied, the power generation state determination unit 702 turns on the UL301b, VL302b, and WL303b which are the negative side arm of the armature winding 122 in step S924. Make a phase short circuit. Furthermore, after performing the multiphase short circuit, the power generation state determination unit 702 executes the processing after step S935 in the return processing flow.

On the other hand, when the condition of the above equation (1) is not satisfied, the power generation state determination unit 702 ends the series of processes because there is no need for a multiphase short circuit. Note that V _{F at} this time is generally a forward voltage when a forward bias is applied to the diode.

When the process proceeds to step S921 in the multiphase short circuit processing flow, this corresponds to a state in which only the armature winding 122 has already been multiphase shorted. Therefore, in step S921, the power generation state determination unit 702 determines whether the condition of the following expression (2) is satisfied.
V _{P2_MAX} V V _B + V _F [V] (2)

  Then, when the condition of the above equation (2) is satisfied, the power generation state determination unit 702 turns on the XL304b, YL305b, and ZL306b which are MOSFETs of the negative pole side arm of the MOSFET of the armature winding 123 in step S922. Make a polyphase short circuit. Furthermore, after performing the multiphase short circuit, the power generation state determination unit 702 executes the processing after step S 931 in the return processing flow.

When _{VP1_MAX} satisfies the condition of the above equation (1) and _{VP2_MAX} satisfies the condition of the above equation (2), as shown in FIG. 9, the armature winding 122 is given priority. Polyphase short circuit.

Finally, when the process proceeds to step S935 in the return process flow, this corresponds to a state in which the armature winding 122 is shorted by multiple phases. Therefore, in step S936, the power generation state determination unit 702 turns off the MOSFET of the arbitrary one-phase negative electrode side arm of the armature winding 122 for T _{GET_PEAK} time.

Further, in step S937, the power generation state determination unit 702 determines whether the condition of the following equation (3) is satisfied.
V _{P1_MAX} <V _B + V _F [V] (3)

  Then, when the condition of the above equation (3) is satisfied, the power generation state determination unit 702 turns off the MOSFETs UL301 b, VL 302 b, and WL 303 b which are negative electrode side arms of the armature winding 122 in step S938 To end the series of processes.

  On the other hand, when the condition of the above equation (3) is not satisfied, the power generation state determination unit 702 ends the series of processes without executing the process of step S938.

When the process proceeds to step S 931 in the return process flow, this corresponds to a state in which both of the armature winding 122 and the armature winding 123 are multiphase shorted. Therefore, in step S932, the power generation state determination unit 702 first turns off the MOSFET of the arbitrary one-phase negative electrode side arm of the armature winding 123 for the T _{GET_PEAK} time.

Further, in step S933, the power generation state determination unit 702 determines whether the condition of the following expression (4) is satisfied.
V _{P2_MAX} <V _B + V _F [V] (4)

  Then, when the condition of the equation (4) is satisfied, the power generation state determination unit 702 turns off the XL304b, YL305b, and ZL306b, which are MOSFETs of the negative arm of the armature winding 123, in step S934. Release

After that, the power generation state determination unit 702 executes the processing after step S935 described above. That is, in step S936, the power generation state determination unit 702 turns off the MOSFET of the arbitrary one-phase negative side arm of the armature winding 122 for the T _{GET_PEAK} time.

  Furthermore, when the condition of the above equation (3) is satisfied, the power generation state determination unit 702 turns off the UL301b, VL302b, and WL303b, which are the negative pole side arms of the armature winding 122, in step S938. To end the series of processes.

  As an actual behavior, when the multiphase short circuit of one armature winding is released, the amplitude of the other phase voltage increases and the peak of the phase voltage increases. For this reason, the polyphase short circuit of the armature winding 122 and the armature winding 123 is not simultaneously released.

  The gate driver 407 turns on / off the target MOSFET 408 based on the on command / off command of each MOSFET received from the power generation state determination unit 702 based on the series process shown in FIG. 9.

  As described above, according to the second embodiment, as in the first embodiment, when the generated current flows due to high rotation despite the fact that the field winding is not excited. And a configuration capable of performing a multiphase short circuit before the battery reaches an overvoltage state. Therefore, the same effect as that of the first embodiment can be obtained.

  Furthermore, according to Embodiment 2, a phase voltage detection unit can be configured using a phase voltage detection sensor provided in a general generator and generator motor. For this reason, the cost reduction of the control apparatus of a power converter can be achieved. Furthermore, according to the second embodiment, instead of using the estimated value, multiphase short circuit control is performed based on the measured value by the sensor, and high control accuracy can be realized.

  Reference Signs List 1 generator motor, 2 battery, 3 internal combustion engine, 4 power transmission means, 11 power converter, 12 rotary electric machine, 111 control device, 112 field power conversion unit, 113 armature power conversion unit, 114 field current sensor, 115 B terminal voltage sensor, 121 field winding, 122, 123 multiphase winding, 124 position sensor, 201 positive pole side claw pole piece, 202 negative pole side claw pole piece, 203 permanent magnet, 301 to 306 three phase Bridge circuit leg, 301a to 306a positive side arm, 301b to 306b negative side arm, 401 B terminal voltage detection unit, 402 rotational speed detection unit, 403 field current detection unit, 404 generated current estimation unit, 405 generated current estimated value Threshold determination unit, 406 negative side arm short circuit control unit, 407 gate driver, 408 MOSFET, 701 phase voltage detection Out part, 702 Power generation state judgment unit.

Claims (3)

AC power output from a rotating electric machine including an armature having a first armature winding and a second armature winding, and a rotor of a field winding type with a magnet, A control device for a power converter comprising a controller for converting power into power and controlling a power converter for supplying power to a battery, comprising:
The controller
Comparing the value of the current generated by the rotating electrical machine with the current threshold set in advance for detecting a state in which the rotating electrical machine is rotating at a high speed when the rotor is not excited;
When the generated current value is equal to or more than the current threshold value, both of the first armature winding and the second armature winding are multi-phase shorted;
If the generated current value is less than the current threshold and greater than 0, then either one of the first armature winding and the second armature winding is shorted by polyphase;
A control device of a power converter, wherein the first armature winding and the second armature winding are returned from a multiphase short circuit state to a normal state when the generated current value does not flow. The power conversion according to claim 1, wherein the controller acquires the rotation speed of the rotor and a supply voltage value supplied to the battery, and estimates the generated current value from the rotation speed and the supply voltage value. Control device AC power output from a rotating electric machine including an armature having a first armature winding and a second armature winding, and a rotor of a field winding type with a magnet, A control device for a power converter comprising a controller for converting power into power and controlling a power converter for supplying power to a battery, comprising:
The controller
In the non-excitation state of the rotor, detection results of the three-phase voltage of the first armature winding and the three-phase voltage of the second armature winding are obtained;
An armature having any one of the three-phase voltage of the first armature winding or the three-phase voltage of the second armature winding in a time width set as a time of one or more periods of the electrical angle of the three-phase voltage The maximum value of the three-phase voltage of the winding is calculated, and when the maximum value is equal to or more than a preset short circuit determination value, one of the armature windings is shorted by multiple phases,
In the state where one of the armature windings is shorted to multiple phases, the maximum value of the three-phase voltage of the other armature winding is calculated, and in the case where the maximum value is equal to or more than a short circuit determination value set in advance, Short-circuiting the other armature winding with multiple phases;
The peak value of the phase voltage is determined by turning off the negative electrode side arm of any one phase of the one armature winding while the one armature winding is shorted by multiple phases, and the peak value of the phase voltage is determined; When the peak value is less than the short circuit determination value, the one armature winding is returned from the polyphase short circuit state to the normal state;
The peak value of the phase voltage is determined by turning off the negative electrode side arm of any one phase of the other armature winding while the other armature winding is short-circuited in multiple phases, and the peak value of the phase voltage is determined. The control device of the electric power converter which returns the above-mentioned other armature winding from a polyphase short circuit state to a usual state, when a peak value becomes less than the above-mentioned short circuit judging value.

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