JP3750681B2 - Permanent magnet type synchronous motor drive control apparatus and method - Google Patents

Description

  The present invention relates to a drive control device that controls a permanent magnet type synchronous motor (hereinafter referred to as PM motor).

  There is a strong demand for miniaturization of motors for driving electric vehicles. A PM motor, which is a motor using a permanent magnet as a means for generating an excitation flux, has a large field magnetomotive force per unit volume, and therefore can be easily reduced in size compared to other types of motors. Various electric vehicles using a PM motor have been proposed.

  At the same time, it is also demanded that a motor for driving a vehicle of an electric vehicle can cover a wide speed range (rotational speed range). The field weakening control, which is a part of vector control, has been used as a method to meet this demand. Here, the vector control is a method of performing target control by dividing the motor current IM into the torque current component Iq and the field current component Id. Among these components, Iq is a component that generates torque (magnet torque) by linkage with the main magnetic flux, that is, the excitation flux obtained by the permanent magnet. Id is a component that generates an excitation flux that partially assists or cancels the main magnetic flux. When the motor has saliency, Id also generates torque (reluctance torque) proportional to Id · Iq. If an attempt is made to extend the speed range of the motor, that is, to extend the operable region of the motor to a region of higher speed rotation, an electromotive force that is generated by the speed electromotive force ω · E0, that is, the main magnetic flux E0 and proportional to the rotational angular velocity ω of the motor. As a result, the motor terminal voltage generally increases as the rotational speed N increases, and often exceeds the value corresponding to the battery voltage VB, which is the power supply voltage. In order to prevent this, an excitation bundle in a direction to cancel E0 is generated by controlling Id, and the method of extending the operable region of the motor to the field weakening region higher than the normal field region (see FIG. 6) By executing this field weakening field control, it is possible to cover a high-speed rotation region even with a relatively small output motor. In addition, although there exists an aspect by an absolute value and a torque angle in vector control, since it is equivalent to the aspect by Id and Iq, it does not distinguish in the following description.

  The field weakening control has such an advantage, but also has an aspect of decreasing efficiency. For example, if there is too much Id during field weakening control (hereinafter also referred to as field weakening current), loss increases due to an increase in Id, which is a current component that does not contribute to or is unlikely to contribute to torque generation. Conversely, if the field weakening current is too small, it will hinder the achievement of the original purpose of the field weakening. That is, in addition to applying stress to the power converter provided between the battery serving as the power source and the motor to be driven for motor output control, problems such as the inability to output necessary Iq also occur. As a method for alleviating these problems, the applicant of the present application has previously proposed a method of changing the value of the field weakening current in accordance with VB (see Japanese Patent Laid-Open No. 7-107772). According to this method, the loss caused by the field weakening control can be minimized and optimized in relation to the battery voltage or the state of charge.

Japanese Patent Laid-Open No. 7-107772

  However, as long as the field weakening control is performed, it is impossible to eliminate the occurrence of loss due to the field weakening current and the decrease in system efficiency due to this. One of the objects of the present invention is to eliminate the need for field-weakening control and to improve the system efficiency by newly adopting a means for boosting the battery voltage. One of the objects of the present invention is to maintain and ensure a speed range in which the PM motor can be operated at a level equal to or higher than that of the prior art by performing boost control according to the position of the target operating point of the PM motor. One of the objects of the present invention is to suppress the occurrence of loss in the booster circuit and further improve the system efficiency by not boosting when the battery voltage is low. One of the objects of the present invention is to realize a more automated system by providing means for autonomously bypassing the booster circuit. One of the objects of the present invention is to provide a means for forcibly bypassing the booster circuit so that the booster circuit can be bypassed when regenerative braking or the like is required. One of the objects of the present invention is to make it possible to eliminate the inrush prevention circuit by using a booster circuit.

  In order to achieve such an object, the present invention uses a power converter that is connected between a battery and a PM motor for running a vehicle and converts VB to IM, and controls the PM motor having a speed electromotive force. In the apparatus, prior to supply to the power converter and in response to a command, a booster circuit that boosts the VB, and a target operating point of the PM motor in a vehicle operating range determined by the motor torque T and the rotational speed N is A determination unit that determines whether or not the output region belongs to the detection value based on the detected value of VB and a voltage value after boosting by the boosting circuit, and the determination unit determines that the output unit does not belong to Means for extending the output possible region so that the target operating point belongs by commanding a boosting ratio to the boosting circuit according to the position of the target operating point. .

  In such a configuration, for example, when the target operating point of the PM motor is located on the higher rotation side than the output possible region under the current VB, the target operating point is included in the output possible region. VB is boosted so that As described above, in the method of the present invention that does not cause the generation or increase of Id, it is possible to eliminate the occurrence of loss due to Id and the decrease in system efficiency due to this. Further, since the method of the present invention has the same characteristics as field weakening control in terms of expansion of the power running possible region, the speed range in which the PM motor can be operated can be maintained and secured at the same level or higher.

Further, the present invention drives a motor that converts a battery voltage (VB) into a current command (Id ^* , Iq ^* ) according to a torque command (T ^* ) and supplies it to a permanent magnet synchronous motor for vehicle travel. In the control method, a step of determining a torque command (T ^* ) that is a target value of the motor output torque based on information from each part of the vehicle, and a current command (Id ^* , Iq ^* ) based on the torque command (T ^* ) ^. ) And the DC terminal side necessary for realizing the torque command (T ^* ) and the motor speed (N) included in the vehicle information based on the current commands (Id ^* , Iq ^* ). The step of obtaining the motor terminal voltage (V), the step of comparing the motor terminal voltage (V) with the battery voltage (VB), and when the condition of V> VB is satisfied, the battery voltage (VB) is set to a predetermined value. Boost with the boost ratio Characterized in that it comprises a step for supplying to a permanent magnet synchronous motor.

Furthermore, the present invention uses a power converter connected between a battery and a permanent magnet type synchronous motor for running the vehicle to convert the battery voltage into a motor current, and based on information from each part of the vehicle, the target value of the motor output torque Torque command (T ^* ) is determined, and the battery voltage (VB) is converted into current commands (Id ^* , Iq ^* ) according to the torque command (T ^* ) and supplied to the permanent magnet type synchronous motor. In the drive control apparatus for controlling the permanent magnet type synchronous motor having speed electromotive force, prior to the supply to the power converter and in response to the command, the booster circuit for boosting the battery voltage, the motor torque T and the rotational speed N whether the target operating point of the permanent magnet synchronous motor in a vehicle operating region defined belongs to the output area at, based on the current command (Id ^*, Iq ^*), the torque command T ^*) and motor speed contained in the vehicle information (N) and the DC terminal of the motor terminal voltage required to achieve the (V), the battery voltage (VB) and the voltage value after boosting by the booster circuit When the condition of V> VB is satisfied, and when the condition of V> VB is satisfied, the target operating point is determined by instructing the boosting circuit to the boosting circuit based on the position of the target operating point and based on the speed electromotive force. Means for boosting the battery voltage (VB) at a predetermined boosting ratio so as to belong to the permanent magnet type synchronous motor, and expanding the output possible region.

  The present invention is not limited to the configuration in which the booster circuit is always used. For example, when boosting is not performed by providing an autonomous gate element (for example, a diode) that forms / cuts off a conduction path not passing through the booster circuit between the battery and the power converter according to the voltage difference before and after the booster circuit In addition, the booster circuit can be bypassed by an autonomous gate element. That is, by not performing boosting when VB is low, generation of loss in the boosting circuit can be suppressed, and system efficiency can be further improved. Moreover, since this bypass formation / blocking is autonomously, that is, automatically performed by the autonomous gate element, a control device or procedure for this is not necessary. Alternatively, a controllable gate element (for example, a thyristor) that forms / cuts off a conduction path that does not go through the booster circuit between the battery and the power converter in response to a command, and controllable when the target operating point belongs to the regeneration side By providing means for giving a command to the mold gate element and forcibly forming the conduction path, the booster circuit can be bypassed as necessary for regenerative braking or the like.

  The present invention is not limited to a configuration in which the booster circuit is used only for boosting. For example, as a booster circuit, a passive element (such as a boosting reactor) that stores energy discharged from a battery, and an active element (transistor) that switches and connects the passive element to the positive and negative input terminals of a power converter according to a command Etc.), these elements can be used to form a path during regeneration, and are generated by charging an inrush prevention circuit, that is, a smoothing capacitor generally provided between the DC terminals of the power converter. Circuits that prevent current can be eliminated using these elements. For that purpose, when the target operating point belongs to the power running side, depending on the result of determination by the determining means and the position of the target operating point, and when the target operating point belongs to the regeneration side and / or the permanent magnet When starting the synchronous motor, the active element may be instructed so that a current path through the passive element is formed between the battery and the power converter.

  According to the present invention, when the target operating point of the PM motor does not belong to the output possible region, VB is boosted according to the position of the target operating point and supplied to the power converter. Since the output range of the PM motor has been expanded so that the point belongs, the field speed of the PM motor can be maintained at the same level or higher as before, while the field weakening control is abolished and the system efficiency is improved. realizable. In particular, by providing an autonomous gate element, it is possible to suppress the occurrence of loss in the booster circuit and further improve the system efficiency without a control device or procedure therefor. Further, by providing a controllable gate element and its control means, the booster circuit can be bypassed as necessary for regenerative braking or the like. And passive devices such as boosting reactors can be used to form a revised path and to charge a smoothing capacitor that is generally installed between the DC terminals of the power converter, thereby simplifying the circuit by eliminating the inrush prevention circuit. it can.

Addendum

  In the above description, the present invention is expressed as an invention related to a “drive control device”. However, the present invention is described as “drive control method”, “drive device”, “drive method”, “power supply device”, “power supply method”, and the like. Can also be expressed. Furthermore, although the application to a pure electric vehicle was assumed, this invention can be applied to various uses regardless of whether it is for industrial use or consumer use, in addition to an electric vehicle or a so-called hybrid vehicle. Further, the permanent magnet type synchronous motor to be controlled is not limited to a three-phase AC motor, and it does not matter whether or not reluctance torque is used.

  Further, the description has been made on the assumption that the output torque of the motor is open-loop controlled based on the detected rotation speed value. However, the rotation speed control (speed control) is performed instead of the output torque control (torque control). In addition, the present invention can be applied to a configuration in which closed loop control is performed instead of open loop control, and also in a configuration in which control is performed based on the rotational speed estimation value instead of the rotational speed detection value. In addition, although the operating point of the motor is expressed exclusively in the torque rotation speed space, other types of space may be used as long as the output of the motor can be expressed, such as a motor voltage current space.

  Further, an example has been described in which when the battery voltage is low, the voltage is boosted and adjusted so as to exceed the counter electromotive force of the motor. However, the voltage may be decreased in a region (part of) where the battery voltage is high. Moreover, although the example which does not perform a raise (down) pressure at the time of regeneration was shown, you may make it carry out. In that case, a switching element in the IPM can be used. Various modifications can be made to the specific configuration of the ascending (falling) pressure circuit. Further, when a circuit having both the step-up and step-down functions is used, elements such as switches, diodes, and thyristors for bypassing the booster circuit can be eliminated. In the first embodiment described above, a parallel circuit of a diode and a thyristor is used, but an element such as a bidirectional thyristor may be used instead. Although details of the operation of the booster circuit have been omitted, such operations are well known to those skilled in the art.

  Note that modifications of the above-described embodiment, particularly those described in this section, can be easily performed by those skilled in the art based on the disclosure of the present application.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a system configuration of an electric vehicle according to an embodiment of the present invention. In this embodiment, a three-phase PM motor 10 is used as a vehicle driving motor. Driving power of the motor 10 is supplied from the battery 12 via an intelligent power module (IPM) 14. That is, the discharge output of the battery 12 is smoothed by the smoothing capacitor C and then converted from direct current to three-phase alternating current by the IPM 14, and the resulting currents iu, iv, iw are converted into the respective phase windings of the motor 10. To be supplied. Further, the output torque of the motor 10 is controlled by the controller 16. That is, the controller generates a switching signal according to the operation of the accelerator, brake, shift, etc. by the vehicle operator and according to the rotation speed (or rotor angular position) of the motor 10 detected by the rotation sensor 18 such as a resolver. Thus, the switching pattern of the switching elements constituting the IPM 14 is controlled. By executing such control, the output torque of the motor 10 can be set to a torque according to the accelerator operation of the vehicle operator. In this control, each phase current iu, iv, iw of the motor 10 is detected by current sensors 20 u, 20 v, 20 w provided corresponding to the windings of the motor 10 and fed back to the controller 16.

  Further, an inrush prevention circuit 22, a diode Df and a thyristor Dr, and a booster circuit 24 are provided between the battery 12 and the IPM 14. Among these, the inrush prevention circuit 22 is a circuit for suppressing or preventing an inrush current that flows due to the charging of the smoothing capacitor C immediately after the battery 12 is connected to the IPM 14, and is turned on / off according to the operation of the ignition (IG). These are composed of two switches SW1 and SW2 connected in parallel and a resistor Rs connected in series to the switch SW2. Further, the booster circuit 24 forms part of the feature of the present invention, and boosts the terminal voltage VB of the battery 12 to a higher voltage VI under the control of the controller 16 and applies it between the DC terminals of the IPM 14. The diode Df is means for bypassing the booster circuit 24 when a large potential difference is not generated between the input terminal and the output terminal of the booster circuit 24, that is, when the booster circuit 24 is not performing the boosting operation. The thyristor Dr is turned on / off by a signal supplied from the controller 16 to generate a current path in a direction opposite to the current direction determined by the diode Df. In the figure, reference numerals 25 and 26 denote voltage sensors for detecting VB and VI, respectively. As an example configuration of the booster circuit 24, two transistors Tr1 and Tr2 connected in series in the forward direction between the DC terminals of the IPM 14, diodes D1 and D2 connected in reverse parallel to these transistors, and transistors Tr1 and Tr2 A configuration including a boosting reactor L having one end connected to the connection point and the other end connected to the battery 12 side is shown.

  FIG. 2 shows the principle of extending the speed range of the motor 10 in this embodiment. The region represented as region A in this figure corresponds to the region represented as the normal field region in FIG. Conventionally, by increasing the field weakening current Id in accordance with the increase in the motor rotation speed N, the motor 10 reaches the characteristic indicated by the solid line in FIG. 2, that is, the region indicated as the field weakening region in FIG. The possible output area was expanded. On the other hand, in the present embodiment, the output possible region of the motor 10 is expanded by the control of the booster circuit 24, not by the control of Id. That is, when the current target operating point (T, N) is located on the higher rotation side than the region that can be realized by the current VB or VI, in this embodiment, for example, from region A to B, From B to C, further from C to D, and so on, the boosting ratio is increased by the booster circuit 24 and VI is increased so that the output possible region of the motor 10 is expanded. Further, since Id control is not involved in the output possible range or speed range extension based on this principle, unlike the conventional field weakening control, the system efficiency is not impaired by such a cause.

  3 and 4 show an example of a procedure executed by the controller 16 in order to realize such a principle. First, as shown in FIG. 3, the controller 16 turns on the switch SW2 of the inrush prevention circuit 22 immediately after the IG is turned on, and turns on the switch SW1 after a while has passed (100). That is, the smoothing capacitor C is charged with the resistor Rs as a charging resistor for a while immediately after the IG is turned on, and then the SW1 is turned on at a time point when the smoothing capacitor C is sufficiently charged, and both ends of the resistor Rs are short-circuited. Thereafter, the operation of the controller 16 shifts to a series of repetitive procedures for controlling the output torque of the motor 10.

When controlling the output torque of the motor 10, the controller 16 first inputs a signal from each part of the vehicle (102). For example, the accelerator opening, brake pedal force, shift lever position, motor rotation speed N, motor currents iu, iv, iw, battery voltage VB, IPM input voltage VI, and the like are input. Thereafter, the controller 16 determines a torque command T ^*, that is, a target value of torque to be output from the motor 10 based on information such as the accelerator opening, the brake pedal force, the shift position, the motor rotation speed N, and the like (104). The controller 16 determines the current command (Id ^* , Iq ^* ) based on the torque command T ^* thus determined so that the system efficiency of the motor 10 is maximized. Of the current commands mentioned here, Id ^* is a command related to the field current component Id, and Iq ^* is a command related to the torque current component Iq. The controller 16 adjusts the IPM input voltage VI using the current command (Id ^* , Iq ^* ) determined in this way (108), and then outputs a signal to the IPM 14 and others (110). That is, a signal indicating a switching pattern is output to the IPM 14 so that the currents iu, iv, and iw corresponding to the current commands (Id ^* , Iq ^* ) flow, and the torque command T ^* is in a regeneration region (T < When it belongs to the area 0, a command to turn on the thyristor Dr is given. The operations in steps 102 to 110 are repeated until the IG is turned off by the vehicle operator (112). When the IG is turned off, the controller 16 turns off the switches SW1 and SW2 (114) and cuts off the power supply from the battery 12 to the motor 10.

The adjustment of the IPM input voltage shown in step 108 is performed in the procedure as shown in FIG. That is, the controller 16 has, for example, the following formula (Equation 1)
Vd = (R + pLd) · Id ^* −ω · Lq · Iq ^*
Vq = ω · Ld · Id ^* + (R + pLq) · Iq ^* + ω · E0
Where R: resistance of motor winding
Ld, Lq: d-axis and q-axis inductance of motor winding
ω: Motor electrical angular velocity
E0: Main magnetic flux
p: (Vd ^* , Vq ^* ) is calculated according to the differential operator (200). Alternatively, instead of this, the following formula (Equation 2)
Vd = Kp · ΔId + Ki · ∫ΔId−ω · Lq · Iq
Vq = Kp · ΔIq + Ki · ∫ΔIq + ω · Ld · Id + ωE0
However, ΔId = Id ^* −Id
ΔIq = Iq ^* −Iq
(Vd ^* , Vq ^* ) may be obtained according to the following. The thus obtained (Vd ^* , Vq ^* ) represents a voltage necessary for realizing the torque command T ^* or for realizing the current command (Id ^* , Iq ^* ). The controller 16 further calculates the following formula (Equation 3)
V = k · (Vd ² + Vq ² ) ^1/2
However, k: The voltage V is calculated | required according to the coefficient for converting a motor terminal voltage into an IPM input voltage. The voltage V obtained in this way is obtained by converting the terminal voltage of the motor 10 necessary to realize the target operating point of the motor 10, that is, (T ^* , N), into a value on the DC terminal side of the IPM 14. Controller 16 determines whether this voltage V is above VB (204) and whether it is above VI (206). When the condition of V> VB is not satisfied among these determination conditions, the target operating point (T ^* , N) is realized when the current battery voltage VB is applied as it is, ie, as VI to the IPM 14 via the diode Df. Since it can be regarded as possible, the controller 16 proceeds to Step 110 without boosting by the booster circuit 24. Further, when the condition of V> VB is satisfied, if the booster circuit 24 has not started its operation at that time, V> VI always holds, and therefore the operation of the controller 16 is step 208, that is, the booster circuit 24. The operation proceeds to the command operation of the step-up ratio with respect to. In step 208, the controller 16 starts an operation of controlling the transistors Tr1 and Tr2 so that VI satisfying V <VI is obtained. Further, even after the boosting operation by the booster circuit 24 is started, the condition of V> VI may be satisfied due to a shortage of the boosting ratio. In this case, step 208 is also executed.

  According to the control procedure as described above, in this embodiment, the power running possible region (especially the speed range) is secured and the motor system efficiency is improved according to the principle shown in FIG.

  FIG. 5 shows a system configuration of an electric vehicle according to the second embodiment of the present invention. In this embodiment, instead of the inrush prevention circuit 22, a switch SW for switching the battery 12 between the IPM 14 side and the booster circuit 24 side is used, and the diode Df and the thyristor Dr are abolished. . Along with this, the operation procedure of the controller 16 has also changed.

  First, in the embodiment described above, the time difference ON control of the switches SW1 and SW2 is performed in step 100 of FIG. 3, but in the embodiment, the switch SW is first tilted to the (1) side in step 100, and the battery 12 is connected to the booster circuit 24. As described above, the booster circuit 24 incorporates the boost reactor L. The controller 16 turns on the upper transistor Tr1 and turns off the lower transistor Tr2, thereby forming a state in which the battery 12 is connected to the IPM 14 side via the boost reactor L and the diode D1, and via the boost reactor L. By charging the smoothing capacitor C, the same function as the inrush prevention circuit 22 in the first embodiment is achieved.

In addition, the controller 16 tilts the switch SW to the (3) side after a time that can be considered that the smoothing capacitor C is sufficiently charged, and connects the battery 12 to the IPM 14 side. Thereafter, as in the first embodiment described above, the procedure according to steps 102 to 110 is repeatedly executed until the vehicle operator turns off the IG. However, when the torque command T ^* belongs to the regeneration region, instead of the control for turning on the thyristor Dr, the control is performed by turning the switch SW to (1) to turn on the transistor Tr1 and turn off the transistor Tr2. By such control, a current path through the boost reactor L is formed as in the case immediately after the IG is turned on, so that braking energy can be regenerated to the battery 12. Further, as a means for regenerating braking energy, it is also possible to regenerate without passing the boost reactor L by turning the switch to (3). Further, after the IG is turned off, the controller 16 turns the switch SW to (2) and disconnects the battery 12 from the IPM 14 and the booster circuit 24.

  Also with such a configuration and procedure, the output possible region of the motor 10 can be expanded and the system efficiency can be improved, as in the first embodiment. Furthermore, in this embodiment, the inrush prevention circuit and others can be eliminated.

1 is a block diagram showing a system configuration of an electric vehicle according to a first embodiment of the present invention. It is a torque rotation speed space diagram which shows the principle of the output possible area | region expansion and system efficiency improvement in this embodiment. It is a flowchart which shows the flow of operation | movement of the controller in this embodiment. It is a flowchart which shows the flow of operation | movement of the controller in this embodiment. It is a block diagram which shows the system configuration | structure of the electric vehicle which concerns on 2nd Embodiment of this invention. It is a torque rotation speed space diagram for demonstrating the conventional field-weakening control.

Explanation of symbols

  10 motor, 12 battery, 14 IPM, 16 controller, 18 resolver, 24 boost circuit, 25, 26 voltage sensor, Df diode, Dr thyristor, L boost reactor, Tr1, Tr2 boost transistor, SW switch, C smoothing capacitor.

Claims (6)

Depending on the torque command (T ^*), the command current battery voltage ^{(VB) (Id *, Iq} *) is converted to the drive control method of the motor is supplied to the permanent magnet synchronous motor for vehicle travel,
Determining a torque command (T ^* ) that is a target value of the motor output torque based on information from each part of the vehicle;
A step of determining a current command (Id ^* , Iq ^* ) based on the torque command (T ^* );
Based on the current command (Id ^* , Iq ^* ), the motor terminal voltage (V) on the DC terminal side required to realize the torque command (T ^* ) and the motor rotation speed (N) included in the vehicle information is calculated. Seeking steps,
Comparing the motor terminal voltage (V) with the battery voltage (VB);
When the condition of V> VB is satisfied, the battery voltage (VB) is boosted at a predetermined boost ratio and supplied to the permanent magnet type synchronous motor;
A drive control method for a permanent magnet type synchronous motor. A power converter connected between the battery and a permanent magnet type synchronous motor for driving the vehicle is used to convert the battery voltage into a motor current. Based on information from each part of the vehicle, a torque command (T ^* ) Is determined, and in accordance with the torque command (T ^* ), the battery voltage (VB) is converted into a current command (Id ^* , Iq ^* ) and supplied to the permanent magnet type synchronous motor. In the drive control device for controlling the permanent magnet type synchronous motor,
Prior to supply to the power converter and in response to a command, a booster circuit that boosts the battery voltage;
Based on the current command (Id ^* , Iq ^* ), whether or not the target operating point of the permanent magnet type synchronous motor in the vehicle operating range determined by the motor torque T and the rotational speed N belongs to the output possible range. , The motor terminal voltage (V) on the DC terminal side necessary for realizing the torque command (T ^* ) and the motor rotational speed (N) included in the vehicle information, the battery voltage (VB), and the boosting by the boosting circuit A determination means for determining based on a subsequent voltage value;
When the condition of V> VB is satisfied, the battery voltage is set so that the target operating point belongs by commanding the boosting ratio to the boosting circuit based on the position of the target operating point and based on the speed electromotive force. Means for boosting (VB) at a predetermined step-up ratio and supplying the same to a permanent magnet type synchronous motor to expand the output possible region;
A drive control device comprising: The drive control apparatus according to claim 2, wherein
An autonomous gate element that forms / cuts off a conduction path not through the booster circuit between the battery and the power converter according to a voltage difference before and after the booster circuit;
The drive control device, wherein the booster circuit is automatically bypassed by the autonomous gate element when boosting is not being executed. The drive control apparatus according to claim 2, wherein
A controllable gate element that forms / cuts off a conduction path not through the booster circuit between the battery and the power converter in response to a command;
Means for instructing the controllable gate element to forcibly form the conduction path when the target operating point belongs to the regeneration side;
A drive control device comprising: The drive control apparatus according to claim 2, wherein
The booster circuit includes a passive element that stores energy discharged from the battery, and an active element that switches and connects the passive element to the positive side and negative side input terminals of the power converter according to a command,
When the target operating point belongs to the power running side, the drive control device depends on the result of determination by the determining means and the position of the target operating point, and when the target operating point belongs to the regeneration side and / or Or a means for instructing the active element so that a current path through the passive element is formed between the battery and the power converter when starting the permanent magnet type synchronous motor. Drive control device. The drive control apparatus according to claim 2, wherein
An inrush prevention circuit for suppressing an inrush current due to charging of a capacitor provided between the DC terminals of the power converter is provided between the battery and the booster circuit and the power converter.

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