JP2023065095A - Motor control apparatus, and motor device - Google Patents

Abstract

To provide: a motor control apparatus capable of accurately determining whether or not abnormality occurs in a pipe; and a motor device.SOLUTION: A motor control apparatus 100 comprises a storage device 230 and an arithmetic processing device 260 for controlling a motor 50 which circulates cooling water 40 inside a pipe 30. The storage device stores a rotation speed of the motor and estimated power consumption estimated to be consumed by the motor at every rotation speed in association with each other. The arithmetic processing device includes: a rotation speed acquisition unit 220 for acquiring the rotation speed; a power calculation unit 210 for calculating actual power consumption as of when the rotation speed is acquired, based on a voltage applied from a battery 11 to the motor and an AC current flowing in the motor; and a pipe abnormality determination unit 240 for acquiring the estimated power consumption associated with the rotation speed acquired by the rotation speed acquisition unit and determining that there is abnormality in the pipe, in a case where there is a power difference between the estimated power consumption and the actual power consumption.SELECTED DRAWING: Figure 2

Description

The disclosure herein relates to motor controllers and motor devices.

Patent Literature 1 describes a fuel cell system. The fuel cell system determines a pipe abnormality by comparing the estimated power of the electric water pump estimated from the power map with the actual power consumption of the electric water pump calculated based on the voltage of the battery and the DC current.

Japanese Patent No. 5194827

The actual power consumption of the electric water pump is derived from the DC current and voltage supplied by the battery. Therefore, it was not possible to accurately obtain the actual power consumption actually consumed by the electric water pump. It was difficult to accurately determine whether or not there was an abnormality in the piping.

Accordingly, an object of the present disclosure is to provide a motor control device and a motor device that can accurately determine whether or not there is an abnormality in piping.

A motor control device according to one aspect of the present disclosure includes:
A motor comprising a storage device (230) and an arithmetic processing device (260) for controlling a motor (50) for circulating cooling water (40) for cooling a heat-generating component (10) inside a pipe (30) A controller (100),
The storage device has
The rotational speed of the motor and the estimated power consumption estimated to be consumed by the motor for each rotational speed are associated and stored,
Arithmetic processing unit
a rotation speed acquisition unit (220) that acquires the rotation speed;
a power calculation unit (210) that calculates the actual power consumption of the motor when the rotation speed is obtained based on the voltage applied to the motor from the battery (11) and the alternating current that flows through the motor;
Estimated power consumption associated with the rotation speed acquired by the rotation speed acquisition unit is acquired from the storage device, the acquired estimated power consumption is compared with the actual power consumption, and the power difference between the estimated power consumption and the actual power consumption is obtained. and a piping abnormality determination unit (240) that determines that there is an abnormality in the piping when there is

According to this, the motor control device calculates the actual power consumption based on the voltage applied to the motor (50) and the AC current flowing through the motor (50). Therefore, the motor control device can accurately calculate the actual power consumption of the motor (50). Accordingly, the motor control device can accurately determine whether or not there is an abnormality in the pipe (30).

Further, a motor device according to one aspect of the present disclosure includes:
a motor (50) for circulating cooling water (40) for cooling the heat-generating component (10) inside the pipe (30);
a motor controller (100) having a storage device (230) and a processor (260) for controlling the motor, the motor device (60) comprising:
The storage device has
The rotational speed of the motor and the estimated power consumption estimated to be consumed by the motor for each rotational speed are associated and stored,
Arithmetic processing unit
a rotation speed acquisition unit (220) that acquires the rotation speed;
a power calculation unit (210) that calculates the actual power consumption of the motor when the rotation speed is obtained based on the voltage applied to the motor from the battery (11) and the alternating current that flows through the motor;
Estimated power consumption associated with the rotation speed acquired by the rotation speed acquisition unit is acquired from the storage device, the acquired estimated power consumption is compared with the actual power consumption, and the power difference between the estimated power consumption and the actual power consumption is obtained. and a piping abnormality determination unit (240) that determines that there is an abnormality in the piping when there is

The motor device has a motor controller. Therefore, the motor device can achieve the same effects as the motor control device.

It should be noted that the reference numbers in parentheses above merely indicate the correspondence with the configurations described in the embodiments described later, and do not limit the technical scope in any way.

It is a schematic diagram explaining a cooling system. It is a schematic diagram explaining the structure of a motor control apparatus and a motor apparatus. 4 is a flowchart for determining whether or not there is a pipe abnormality in the cooling system; FIG. 3 is a schematic diagram for explaining power detection specifications of a cooling system; FIG. 5 is a schematic diagram illustrating power detection specifications of another cooling system different from the present embodiment;

A plurality of modes for carrying out the present disclosure will be described below with reference to the drawings. In each form, the same reference numerals may be given to the parts corresponding to the matters described in the preceding form, and overlapping explanations may be omitted. When only a part of the configuration is described in each form, the previously described other forms can be applied to other parts of the configuration.

In addition, not only combinations of parts that are explicitly stated that combinations are possible in each embodiment, but also embodiments, embodiments and modifications, even if not explicitly stated, as long as there is no particular problem with the combination. And it is also possible to partially combine the modifications.

(First embodiment)
The cooling system 1 can be used as a system that is mounted on a vehicle and cools the heat-generating components 10 of the vehicle. For example, in an electric vehicle or a hybrid vehicle, the cooling water 40 is circulated through the pipe 30 to cool the heat-generating parts 10 . Note that the heat-generating component 10 includes, for example, a battery 11, a drive motor, an inverter, a power control unit, and the like. In the drawings, the battery 11 is abbreviated as BATT, the drive motor as M1, the inverter as INV1, and the power control unit as PCU.

In particular, when one of the heat-generating components 10 is the battery 11 , cooling the battery 11 with the cooling system 1 can reduce deterioration of the battery 11 due to temperature rise. The deterioration of the battery 11 can be suppressed, and the performance of the battery 11 can be exhibited stably over a long period of time.

Further, in an engine-driven vehicle, the cooling water 40 can be circulated through the cooling system 1 to cool the heat-generating parts 10 such as the engine. Besides being used in vehicles, the cooling system 1 can be widely applied to devices that exchange heat, such as home air conditioners and cooling devices 20 for servers.

In FIG. 1 , the cooling system 1 has a cooling device 20 , piping 30 and an electric water pump 60 . In the drawings, the cooling device 20 is abbreviated as CS. The electric water pump 60 corresponds to a motor device.

The cooling device 20 is a device for exchanging heat between cooling water 40 flowing inside the pipe 30 and fluid such as air flowing on the surface of the cooling device 20 . When the cooling system 1 is mounted on a vehicle, the cooling device 20 receives the running wind of the vehicle, thereby promoting heat exchange.

The electric water pump 60 is a device that functions as a power source for circulating the cooling water 40 inside the pipe 30 . Electric water pump 60 is powered by battery 11 . The electric water pump 60 has a motor 50 and a motor control device 100 that controls the motor 50 . The motor control device 100 drives and controls the motor 50 . The motor 50 is driven and controlled to circulate the cooling water 40 inside the pipe 30 . The cooling water 40 cools the heat-generating component 10 . In the drawings, the motor 50 is abbreviated as M2, and the motor control device 100 is abbreviated as MC.

As shown in FIGS. 1 and 2, motor control device 100 is electrically connected to host ECU 70 . A target rotation speed of the motor 50 is transmitted from the host ECU 70 to the motor control device 100 . Information such as the determination result, the actual power consumption of the motor 50 , the actual rotational speed of the motor 50 , the state of the electric water pump 60 , and the like is transmitted from the motor control device 100 to the host ECU 70 . In the drawings, the host ECU 70 is abbreviated as UECU.

Next, the electrical connections between the battery 11, the motor control device 100 and the host ECU 70 will be described with reference to FIG. Battery 11 and motor 50 are electrically connected via motor control device 100 . A host ECU 70 and a motor 50 are electrically connected via a motor control device 100 .

<Motor controller>
The motor control device 100 includes a microcomputer 200, a driver circuit 300, a voltage detection circuit 400, a current detection circuit 500, a communication circuit 600, and a filter circuit 700, as shown in FIG. In the drawings, the driver circuit 300 is abbreviated as DC, the voltage detection circuit 400 as VDC, the current detection circuit 500 as CDC, the communication circuit 600 as CC, and the filter circuit 700 as FC.

Driver circuit 300 is provided between battery 11 and motor 50 . Driver circuit 300 converts the DC current supplied from battery 11 into AC current for driving motor 50 . Also, the driver circuit 300 is electrically connected to the microcomputer 200 .

The driver circuit 300 includes an inverter 310 capable of converting direct current to alternating current, and a smoothing capacitor 320 for smoothing the direct current supplied from the battery 11 . Smoothing capacitor 320 gently reduces the DC current flowing through inverter 310 . In the drawings, the inverter 310 is abbreviated as INV2, and the smoothing capacitor 320 is abbreviated as C2.

A voltage detection circuit 400 is provided between the battery 11 and the microcomputer 200 . A voltage detection circuit 400 is a circuit capable of detecting the voltage applied to the motor 50 . A voltage detected by the voltage detection circuit 400 is input to the microcomputer 200 . A current detection circuit 500 is provided between the driver circuit 300 and the motor 50 . The current detection circuit 500 is a circuit capable of detecting alternating current supplied from the driver circuit 300 to the motor 50 . An alternating current detected by the current detection circuit 500 is input to the microcomputer 200 .

A communication circuit 600 is provided between the host ECU 70 and the microcomputer 200 . Communication circuit 600 is a circuit capable of transmitting information between microcomputer 200 and host ECU 70 .

Filter circuit 700 is provided between battery 11 and driver circuit 300 . The filter circuit 700 is a circuit including electronic components such as a filter capacitor 710 for removing noise flowing through the electrical wiring between the battery 11 and the driver circuit 300 .

Filter circuit 700 is provided between battery 11 and microcomputer 200 via voltage detection circuit 400 . Filter circuit 700 removes noise flowing in the electrical wiring between battery 11 and microcomputer 200 . An ignition switch 12 for controlling on/off of the microcomputer 200 is provided in the electrical wiring that electrically connects the battery 11 and the filter circuit 700 . In the drawing, filter capacitor 710 is abbreviated as C1. The ignition switch 12 is abbreviated as IG.

The microcomputer 200 includes an arithmetic processing unit 260 such as a CPU, a storage device 230 such as ROM and RAM, an IO interface, and the like. The ROM stores programs executed by the CPU and data. The data includes information stored in association with the rotation speed of the motor 50 and the estimated power consumption of the motor 50 for each rotation speed. The RAM temporarily stores the results of calculations performed by the arithmetic processing unit 260, signals obtained by the IO interface, and the like. The CPU executes programs stored in the ROM while using the temporary storage function of the RAM. Accordingly, the microcomputer 200 executes various functions.

As functions, the motor control device 100 has a power calculation unit 210 , a rotational speed acquisition unit 220 , a piping abnormality determination unit 240 , and a driver control unit 250 . Functions are also called function blocks. It can be said that the program has the functions of the power calculation unit 210 , the rotation speed acquisition unit 220 , the piping abnormality determination unit 240 , and the driver control unit 250 .

In the drawings, the power calculation unit 210 is abbreviated as PCS, the rotational speed acquisition unit 220 as RSAS, the piping abnormality determination unit 240 as PAJS, and the driver control unit 250 as DCS. The storage device 230 is abbreviated as MD.

Based on the voltage detected by the voltage detection circuit 400 and the AC current detected by the current detection circuit 500 , the power calculation unit 210 calculates the actual power consumption of the motor 50 . A rotation speed acquisition unit 220 acquires the rotation speed of the motor 50 .

The pipe abnormality determination unit 240 determines that the pipe 30 has an abnormality. The piping abnormality determination unit 240 acquires from the storage device 230 the estimated power consumption of the motor 50 associated with the rotation speed acquired by the rotation speed acquisition unit 220 . The piping abnormality determination unit 240 compares the acquired estimated power consumption with the actual power consumption of the motor 50 when the rotation speed is acquired. The piping abnormality determination unit 240 determines that there is an abnormality in the piping 30 when there is a power difference between the estimated power consumption and the actual power consumption.

Further, the piping abnormality determination unit 240 may determine that there is an abnormality in the piping 30 especially when the power difference between the actual power consumption and the estimated power consumption is equal to or greater than a predetermined value. The piping abnormality determination unit 240 determines that the piping 30 is normal when there is no power difference or when the power difference is smaller than a predetermined value.

The driver control unit 250 vector-controls the driver circuit 300 . In vector control, a current component that generates torque and a current component that generates magnetic flux in the rotor are separated, and each current component can be controlled independently. The motor control device 100 can calculate the actual power consumption based on the current component that generates the torque and the voltage applied from the battery 11 .

Unlike the present embodiment, in the method in which the driver control unit 250 compares the voltage of each phase and the reference voltage to generate the drive signal for the motor 50, it is difficult for the motor control device 100 to calculate the actual power consumption.

The cooling system 1 described above comprises a control device called a motor control device 100 . The control device in this specification may also be called an electronic control unit (ECU). A control device, or control system, is provided by (a) an algorithm as a plurality of logics called if-then-else form, or (b) a trained model tuned by machine learning, such as an algorithm as a neural network. .

The controller is provided by a control system including at least one computer. A control system may include multiple computers linked by data communication devices. A computer includes at least one processor that is hardware (hardware processor). A hardware processor may be provided by (i), (ii), or (iii) below.

(i) the hardware processor may be at least one processor core executing a program stored in at least one memory; In this case, the computer is provided by at least one memory and at least one processor core. The processor core is called CPU: Central Processing Unit, GPU: Graphics Processing Unit, RISC-CPU, or the like. Memory is also called a storage medium. A memory is a non-transitory and tangible storage medium that non-temporarily stores "programs and/or data" readable by a processor. A storage medium is provided by a semiconductor memory, a magnetic disk, an optical disk, or the like. The program may be distributed alone or as a storage medium storing the program.

(ii) a hardware processor may be a hardware logic circuit; In this case, the computer is provided by digital circuits containing a large number of programmed logic units (gate circuits). Digital circuits are also called logic circuit arrays, eg, ASICs, FPGAs, SoCs, PGAs, CPLDs, and the like. A digital circuit may include a memory that stores programs and/or data. Computers may be provided by analog circuits. Computers may be provided by a combination of digital and analog circuits.

(iii) The hardware processor may be a combination of (i) above and (ii) above. (i) and (ii) are located on different chips or on a common chip. In these cases, part (ii) is also called an accelerator.

Controllers, signal sources, and controlled objects provide a variety of elements. At least some of those elements may be referred to as blocks, modules, or sections. Moreover, the elements included in the control system are called functional means only if they are intentional.

The controller and techniques described in this disclosure may be implemented by a dedicated computer provided by configuring a processor and memory programmed to perform one or more functions embodied by the computer program. may be Alternatively, the controls and techniques described in this disclosure may be implemented by a dedicated computer provided by configuring the processor with one or more dedicated hardware logic circuits.

The control units and techniques described in this disclosure may be implemented by a dedicated computer configured with a processor and memory programmed to perform one or more functions and a combination of the processor configured with hardware logic circuitry. , may be implemented. The computer program may also be stored as computer-executable instructions on a computer-readable non-transitional tangible recording medium.

<Power difference and piping abnormality>
Prior to describing the operation of determining an abnormality in the pipe 30 in this embodiment, the actual power consumption and the estimated power consumption of the motor 50 will be described. An impeller (not shown), for example, is connected to the shaft of the motor 50 . The impeller is provided in the middle of the flow path through which the cooling water 40 flows, and plays a role of circulating the cooling water 40 inside the pipe 30 . According to this, the actual power consumption of the motor 50 is considered to be the amount of work for the motor 50 to circulate the cooling water 40 inside the pipe 30 .

When an abnormality such as clogging or leakage occurs in the pipe 30, the flow rate of the cooling water 40 flowing inside the pipe 30 decreases. The flow rate of cooling water 40 through the impeller is then reduced. Accordingly, the work load of the motor 50, that is, the actual power consumption of the motor 50 is reduced.

At this time, the amount of alternating current flowing through the electrical wiring electrically connecting the driver circuit 300 and the motor 50 decreases. The actual power consumption of the motor 50 is calculated based on the voltage detected by the voltage detection circuit 400 and the amount of alternating current detected by the current detection circuit 500 . Therefore, when an abnormality such as clogging or leakage occurs in the piping 30, the actual power consumption of the motor 50 is reduced. An effective value may be used as an example of the amount of alternating current.

Also, as an example, the rotation speed of the motor 50 depends on the frequency of the alternating current. Therefore, the rotational speed of the motor 50 does not depend on the amount of alternating current. Therefore, when an abnormality occurs in the piping 30, a difference occurs between the estimated power consumption and the actual power consumption.

As described above, when an abnormality such as clogging or leakage occurs in the piping 30, the actual power consumption tends to be smaller than the estimated power consumption. The actual power consumption and the estimated power consumption are compared, and if there is a power difference, it is determined that the piping 30 is abnormal.

In particular, when the power difference is equal to or greater than a predetermined value, the pipe abnormality determination unit 240 determines that the pipe 30 has an abnormality that reduces the cooling efficiency between the heat-generating component 10 and the cooling water 40 . The predetermined value is the power difference between the estimated power consumption and the actual power consumption when a problem such as a decrease in the cooling efficiency of the heat-generating component 10 occurs due to an abnormality in the piping 30 .

Further, even when an abnormality occurs in the pipe 30 such that the actual power consumption becomes larger than the estimated power consumption, it is possible to determine whether or not the pipe 30 is abnormal by the same means.

<Flow of pipe abnormality judgment>
Next, piping abnormality determination of the motor control device 100 will be described according to the flowchart of FIG. In this description, in order to clarify which component included in the motor control device 100 is the processing to be executed, the subject of the sentences explaining the processing is changed to The components of the motor control device 100 that execute processing will be described. In the drawings, S indicates the start of the flow, and E indicates the end of the flow.

When the ignition switch 12 is turned on, the motor control device 100 starts executing the flowchart shown in FIG. In step S810, the rotation speed acquisition unit 220 acquires the rotation speed of the motor 50. FIG. As an example, the arithmetic processing unit 260 obtains the rotation speed of the motor 50 based on a predetermined arithmetic expression from the frequency of the alternating current flowing through the electric wiring electrically connecting the driver circuit 300 and the motor 50 .

In step S<b>820 , the piping abnormality determination unit 240 acquires the estimated power consumption of the motor 50 according to the rotation speed of the motor 50 . The storage device 230 stores information that associates the rotation speed of the motor 50 with estimated power consumption. From the storage device 230, the piping abnormality determination unit 240 acquires the estimated power consumption associated with the rotational speed of the motor 50 acquired in step S810. In other words, from the storage device 230, the processing unit 260 acquires the estimated power consumption associated with the rotation speed of the motor 50 acquired in step S810.

In step S<b>830 , power calculation unit 210 calculates actual power consumption actually consumed by motor 50 based on the voltage detected by voltage detection circuit 400 and the AC current detected by current detection circuit 500 . In other words, based on the voltage detected by the voltage detection circuit 400 and the AC current detected by the current detection circuit 500, the arithmetic processing unit 260 calculates the actual power consumption.

In step S840, the piping abnormality determination unit 240 determines whether or not there is a power difference between the estimated power consumption and the actual power consumption. Arithmetic processing unit 260 calculates a power difference between the estimated power consumption temporarily stored in storage device 230 and the actual power consumption. The power difference is the absolute value of the value calculated by subtracting the actual power consumption from the estimated power consumption, or the absolute value of the value calculated by subtracting the estimated power consumption from the actual power consumption. be.

If there is a power difference, go to step S850. In step S850, the pipe abnormality determination unit 240 determines that the pipe 30 has an abnormality. Note that the process may proceed to step S850 when the power difference is greater than or equal to a predetermined value.

If there is no power difference, go to step S860. In step S860, the pipe abnormality determination unit 240 determines that the pipe 30 has no abnormality. Note that if the power difference is less than the predetermined value, the process may proceed to step S860.

Further, the motor control device 100 performs piping abnormality determination only when the ignition switch 12 is on. In other words, the piping abnormality determination unit 240 performs the piping abnormality determination only when the ignition switch 12 is on.

<Communication circuit and host ECU>
When the pipe 30 is determined to be abnormal based on the flowchart of FIG. 3, the result of the determination is transmitted from the pipe abnormality determination unit 240 to the communication circuit 600 via the interface. The communication circuit 600 is electrically connected to the host ECU 70 as shown in FIG. The determination result is transmitted from communication circuit 600 to host ECU 70 . Further, the motor control device 100 may transmit information of the motor 50 such as the actual power consumption and the actual rotational speed to the host ECU 70 via the communication circuit 600 .

Based on these pieces of information, the host ECU 70 transmits the target rotation speed of the motor 50 to the communication circuit 600 . The target rotation speed is, for example, a rotation speed of the motor 50 sufficient to circulate the cooling water 40 in the pipe 30 to cool the heat-generating component 10 . The target rotational speed of motor 50 is transmitted from communication circuit 600 to driver control section 250 . Further, the driver control unit 250 vector-controls the driver circuit 300 according to the target rotational speed.

Communication circuit 600 transmits the determination result to external device 80 via host ECU 70 . The external device 80 includes a lamp and the like. The host ECU 70 controls lighting of the lamp based on the determination result. When there is an abnormality in the piping 30, the host ECU 70 turns on the lamp. If there is no abnormality in the pipe 30, the host ECU 70 does not turn on the lamp. Further, the host ECU 70 may transmit the determination result to an external device 80 such as a lamp. In that case, the external device 80 may control lighting of the lamp based on the determination result.

The lamps are provided, for example, on the instrument panel in front of the vehicle. The user can recognize a piping abnormality by turning on the lamp. In the drawings, the external device 80 is abbreviated as ED.

<Superiority of Embodiment>
FIG. 4 shows the cooling system 1 of this embodiment. In the cooling system 1 shown in FIG. 4 , the motor 50 and the motor control device 100 are housed in the housing 110 . A power calculation unit 210 that calculates the actual power of the motor 50 is provided in the motor control device 100 . A power calculator 210 calculates the actual power consumption of the motor 50 from the alternating current flowing through the motor 50 and the voltage applied to the motor 50 . Then, the pipe abnormality determination unit 240 included in the motor control device 100 calculates the power difference between the estimated power consumption and the actual power consumption, and determines whether or not the pipe 30 has an abnormality.

FIG. 5 shows another cooling system 1a different from this embodiment. In the cooling system 1a shown in FIG. 5, a power calculator 120 corresponding to the power calculator 210 is provided in the electrical wiring connecting the battery 11 and the motor 50. As shown in FIG. A piping abnormality determination unit 240 is provided in the host ECU 70 .

In this case, the power computing unit 120 computes the actual power consumption of the motor 50 from the voltage applied to the motor 50 and the DC current flowing through the electrical wiring electrically connecting the battery 11 and the motor 50 . Then, a piping abnormality determination unit 240 included in the host ECU 70 calculates a power difference between the estimated power consumption and the actual power consumption, and determines whether or not the piping 30 has an abnormality.

Power calculator 120 does not use smoothing capacitor 320 shown in FIG. Therefore, the actual power consumption calculated by power calculator 120 tends to be higher than the actual power consumption calculated by power calculator 210 . When the power calculator 120 calculates the actual power consumption, it is difficult to accurately calculate the actual power consumption actually consumed by the motor 50 . Therefore, it is difficult to accurately determine a piping abnormality.

Further, in the cooling system 1a, since the power calculator 120 is provided in the electrical wiring that electrically connects the battery 11 and the motor 50, noise from the electrical components connected to the battery 11 and the battery 11 is There is a possibility that it will be input to the calculator 120 . Therefore, there is a possibility that the value of the actual power consumption may become unstable. The electric parts include a drive motor, an inverter, a power control unit, etc. included in the heat-generating part 10 .

In contrast, in the cooling system 1 motor control, the actual power consumption is calculated by the power calculation unit 210 via the filter circuit 700 included in the motor control device 100, so noise from the electrical components and the battery 11 is included in the power calculation. It is difficult to input to the part 210 . Therefore, the value of actual power consumption tends to be stable.

<Effect>
The power calculation unit 210 calculates the actual power consumption of the motor 50 based on the voltage detected by the voltage detection circuit 400 and the AC current detected by the current detection circuit 500 . According to this, the motor control device 100 can accurately calculate the actual power consumption of the motor 50 . Since the actual power consumption is calculated based on the alternating current instead of the direct current, the actual power consumption can be calculated accurately.

The piping abnormality determination unit 240 acquires estimated power consumption according to the rotation speed of the motor 50 and determines that there is an abnormality in the piping 30 when there is a power difference between the actual power consumption and the estimated power consumption. As the actual power consumption is calculated accurately, the piping abnormality determination unit 240 can accurately acquire the power difference between the actual power consumption and the estimated power consumption.

As a result, the pipe abnormality determination unit 240 can accurately determine whether or not the pipe 30 has an abnormality. Further, when the power difference between the actual power consumption and the estimated power consumption is equal to or greater than a predetermined value, the piping abnormality determination unit 240 determines that the piping 30 has an abnormality that reduces the cooling efficiency between the heat-generating component 10 and the cooling water 40. It can be determined that

The driver control unit 250 vector-controls the driver circuit 300 . According to this, the piping abnormality determination unit 240 can calculate the actual power consumption based on the current component and the voltage that generate the torque, and can further compare the actual power consumption with the estimated power consumption.

Driver circuit 300 includes inverter 310 and smoothing capacitor 320 . Smoothing capacitor 320 gently reduces the DC current flowing through inverter 310 . Accordingly, the current value of the alternating current supplied to the motor 50 becomes smaller than the current value of the direct current supplied from the battery 11 .

Therefore, based on the voltage detected by the voltage detection circuit 400 and the current value of the alternating current detected by the current detection circuit 500, the power calculation unit 210 calculates the actual power consumption of the motor 50, thereby obtaining an accurate actual power consumption of the motor 50. Power consumption can be calculated accurately.

The motor control device 100 further has a communication circuit 600 that transmits information of the motor 50 such as the determination result and the actual power consumption and the actual rotational speed to the host ECU 70 . According to this, the determination result of the pipe abnormality determination unit 240 is transmitted to the external device 80 via the communication circuit 600 and the host ECU 70, so that the user can recognize the abnormality of the pipe 30. FIG.

As described above, the piping abnormality determination unit 240 performs piping abnormality determination only when the ignition switch 12 is on. This suppresses power consumption by the motor control device 100 when the ignition switch 12 is off.

(Second embodiment)
In the first embodiment, a configuration has been described in which the rotation speed acquisition unit 220 acquires the rotation speed of the motor 50 based on the frequency of the alternating current. However, the rotation speed of the motor 50 may be obtained directly by a speed sensor instead of the rotation speed acquisition section 220 .

(Third Embodiment)
In the first embodiment, when it is determined that there is an abnormality in the piping, the lamp is turned on to notify the user of the abnormality. For example, a display panel provided in the vehicle may display "Abnormal occurrence of piping" or the like. Alternatively, the notification may be made by voice. Moreover, you may combine them.

Although the present disclosure has been described with reference to examples, it is understood that the present disclosure is not limited to such examples or structures. The present disclosure also includes various modifications and modifications within the equivalent range. In addition, while various combinations and configurations are shown in this disclosure, other combinations and configurations, including only one element, more, or less, are within the scope and spirit of this disclosure. is to enter.

DESCRIPTION OF SYMBOLS 10... Heat-generating part 11... Battery 12... Ignition switch 30... Piping 40... Cooling water 50... Motor 60... Motor device 70... Host ECU 80... External device 100... Motor control device 110... Package 210 Power calculation unit 220 Rotation speed acquisition unit 230 Storage device 240 Piping abnormality determination unit 250 Driver control unit 260 Arithmetic processing unit 300 Driver circuit 320 Smoothing capacitor 400 ... voltage detection circuit 500 ... current detection circuit 600 ... communication circuit 700 ... filter circuit

Claims (9)

A motor comprising a storage device (230) and an arithmetic processing device (260) for controlling a motor (50) for circulating cooling water (40) for cooling a heat-generating component (10) inside a pipe (30) A controller (100),
The storage device includes
a rotational speed of the motor and an estimated power consumption estimated to be consumed by the motor for each rotational speed are stored in association with each other;
The arithmetic processing unit is
a rotation speed acquisition unit (220) for acquiring the rotation speed;
A power calculation unit (210) for calculating the actual power consumed by the motor when the rotational speed is acquired, based on the voltage applied to the motor from the battery (11) and the alternating current flowing through the motor. and,
obtaining the estimated power consumption associated with the rotation speed obtained by the rotation speed obtaining unit from the storage device, comparing the obtained estimated power consumption with the actual power consumption, and comparing the estimated power consumption with the actual power consumption; A motor control device comprising: a piping abnormality determination unit (240) that determines that there is an abnormality in the piping when there is a power difference from the actual power consumption. 2. The motor control device according to claim 1, wherein the piping abnormality determination unit determines that there is an abnormality in the piping when the power difference is equal to or greater than a predetermined value. a voltage detection circuit (400) for detecting the voltage;
A current detection circuit (500) that detects the alternating current,
3. The motor control according to claim 1, wherein the power calculation unit calculates the actual power consumption based on the voltage detected by the voltage detection circuit and the AC current detected by the current detection circuit. Device. The motor control device according to any one of claims 1 to 3, further comprising a filter circuit (700) for removing noise contained in the DC current supplied from the battery. further comprising a driver circuit (300) that converts the direct current supplied from the battery to the alternating current;
The motor control device according to any one of claims 1 to 4, wherein said arithmetic processing device further comprises a driver control section (250) for vector-controlling said driver circuit. 6. The motor controller of claim 5, wherein said driver circuit includes a smoothing capacitor (320) for reducing said DC current. The motor control according to any one of claims 1 to 6, further comprising a communication circuit (600) for transmitting a determination result of the piping abnormality determination unit to a host ECU (70) connected to an external device (80). Device. The motor control device according to any one of claims 1 to 7, wherein the piping abnormality determination section performs abnormality determination only when an ignition switch (12) provided in the vehicle is turned on. a motor (50) for circulating cooling water (40) for cooling the heat-generating component (10) inside the pipe (30);
A motor device (60) comprising: a motor control device (100) having a storage device (230) and a processor (260) for controlling the motor,
The storage device includes
a rotational speed of the motor and an estimated power consumption estimated to be consumed by the motor for each rotational speed are stored in association with each other;
The arithmetic processing unit is
a rotation speed acquisition unit (220) for acquiring the rotation speed;
A power calculation unit (210) for calculating the actual power consumed by the motor when the rotational speed is acquired, based on the voltage applied to the motor from the battery (11) and the alternating current flowing through the motor. and,
obtaining the estimated power consumption associated with the rotation speed obtained by the rotation speed obtaining unit from the storage device, comparing the obtained estimated power consumption with the actual power consumption, and comparing the estimated power consumption with the actual power consumption; A motor device comprising: a piping abnormality determination unit (240) that determines that there is an abnormality in the piping when there is a power difference from the actual power consumption.

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