JP6443268B2 - Control device for rotating electrical machine - Google Patents

Description

  The present invention relates to a control device for a rotating electrical machine.

  Conventionally, in a rotating electric machine that includes a multiphase winding and a field winding and rectifies an AC output current output from the multiphase winding by a plurality of rectifying elements or switching elements, a constant field winding of the rotor The energization period per period is changed. The ratio of the energization period to the field winding is called a duty value, and this duty value is variably set according to the amount of power generation required for the rotating electrical machine.

  As a device for changing the duty value of the field winding, there is a control device described in Patent Document 1. In the control device described in Patent Document 1, switching between short-time rated operation with a large duty value for the field winding and continuous rated operation with a small duty value is possible. In addition, a temperature detector is provided in the vicinity of the power transistor that controls energization of the field winding. If the temperature detected by the temperature detection unit indicates an overheated state, the short-time rated operation is prohibited.

JP 2013-219965 A

  In the control device described in Patent Document 1, although the short-time rated operation is prohibited when the temperature in the vicinity of the power transistor that controls the energization of the field winding indicates an overheated state, the energizing current to the field winding The field winding is energized over a long period of time and always generates heat above a certain level. Therefore, it is rare that the temperature detected by the temperature detection unit indicates an overheated state, and it cannot be said that the control according to the usage state of the rotating electrical machine can be performed.

  The present invention has been made to solve the above-described problems, and a main object thereof is to provide a control device capable of changing the output in accordance with the use state of the rotating electrical machine.

  In the first configuration, there is provided a control device for a rotating electrical machine that includes a multi-phase winding and a field winding, and controls energization of the multi-phase winding with a plurality of switching elements. Based on the temperature detected by the temperature detector and the temperature detected by the temperature detector, the duty value indicating the ratio of the energization period per predetermined period for the field winding, the torque when using the rotating electric machine as the electric motor, and the rotation A control unit that obtains at least one upper limit value of the generated current when the electric machine is used as a generator and an upper limit time during which driving at the upper limit value can be continued, and the upper limit value has a low temperature. The upper limit time is a larger value as the temperature is lower.

  In the above configuration, when the temperature of the switching element is low, the upper limit value of at least one of the duty value, torque, and generated current is set to a larger value. Torque or generated current can be obtained. At this time, the heat generation amount per unit time increases as the upper limit values of the duty value, torque, and generated current increase. In this respect, since the upper limit time is associated with the temperature in addition to the upper limit value, it is possible to suppress excessive heat generation due to driving at the set upper limit value. In addition, the current flowing through the switching element frequently changes depending on the operating state. Therefore, there may be a case where there is a margin in temperature and a case where the temperature is not. Therefore, by changing the upper limit value according to the temperature of the switching element, it is possible to perform control in accordance with the actual use situation.

  In the second configuration, in addition to the first configuration, at least one of the duty value, torque, and generated current can be communicated with another control device that transmits a command value determined according to a request regarding the operation of the rotating electrical machine. The control unit transmits the upper limit value and the upper limit time to another control device, and controls the duty value based on the received command value.

  In the above configuration, since it is not necessary to provide a function for generating a command value in the control unit, the configuration of the control unit can be simplified. Further, in addition to each request regarding the operation of the rotating electrical machine, the command value is determined based on the upper limit value and the upper limit time, so that the operation of the rotating electrical machine can be performed in an appropriate state while satisfying each request. it can.

  In the third configuration, in addition to the second configuration, the control unit acquires a plurality of combinations of the upper limit value and the upper limit time based on the temperature detected by the temperature detection unit, and sets the plurality of combinations to other The command value obtained by a combination selected based on the control state of the rotating electrical machine from among a plurality of combinations is acquired from another control device.

  In the above configuration, whether to give priority to the upper limit value or to give priority to the upper limit time is selected according to the control state of the rotating electrical machine. Therefore, it is possible to perform control in which priority is given to the upper limit time in a control state where continuous driving of the rotating electrical machine is necessary, and control in which priority is given to the upper limit value in a control state where a large current is required. Therefore, it is possible to control according to the control state.

  In the fourth configuration, in addition to any one of the first to third configurations, the temperature detection unit is a temperature-sensitive diode.

  When a temperature-sensitive diode is used as the temperature detector, the detected temperature is output as a voltage value, and the temperature detection accuracy and responsiveness are high. Therefore, more precise and quick control can be performed.

  In the fifth configuration, in addition to any one of the first to fourth configurations, the temperature detection unit detects the temperature of the switching element.

  In the sixth configuration, in addition to any one of the first to fifth configurations, the temperature detection unit is configured as a module by being mounted on a common substrate with the switching element for each phase. The temperature is transmitted to the control unit.

  If a circuit for separately detecting the temperature of the switching element is provided, the manufacturing cost will increase. In this configuration, since the temperature detection unit is also mounted on the substrate on which the switching element is mounted and modularized, it is not necessary to provide a separate substrate on which the temperature detection unit is mounted, thereby suppressing an increase in manufacturing cost. Can do.

  In the seventh configuration, in addition to the sixth configuration, one of the plurality of modules acquires the temperature of the other module and transmits the temperature from the module to the control unit.

  In this configuration, since only one line connecting the module and the control unit is required, the manufacturing cost can be reduced.

  In the eighth configuration, in addition to the seventh configuration, the temperature transmitted from the module to the control unit is the highest temperature among a plurality of temperatures.

  In this configuration, since the upper limit duty and the upper limit time are obtained from the highest temperature, the upper limit duty and the upper limit time can be set in accordance with the switching element having the strictest temperature condition. In addition, since only one temperature needs to be transmitted from the module to the control unit, the amount of information to be transmitted can be reduced, and the processing in the control unit can be simplified.

  In a ninth configuration, the control unit is characterized in that the control period is constant and the duty value is switched stepwise for the energization period of the field winding.

  With this configuration, the control can be further simplified, and the processing load on the control unit can be further reduced.

It is a schematic block diagram of the control apparatus which concerns on embodiment. It is a figure which shows the relationship between temperature, upper limit Duty, and upper limit time.

Hereinafter, the rotating electrical machine according to the present embodiment will be described with reference to the drawings.

  FIG. 1 is a schematic diagram showing an overall configuration of a generator control device according to the present embodiment. The control device for a rotating electrical machine according to the present embodiment is assumed to be mounted on a vehicle. That is, when the rotating electrical machine functions as an alternator (generator), the AC output current is rectified by the inverter and power is supplied to the battery 10. On the other hand, when the rotating electrical machine is caused to function as a motor (electric motor), the electric power supplied from the battery is converted into an alternating current by an inverter. The battery 10 is, for example, a lead battery having a terminal voltage of about 12V.

  The inverter includes a U-phase module 20u, a V-phase module 20v, and a W-phase module 20w. Each phase module 20u, 20v, 20w of this inverter is connected to a U-phase winding 31u, a V-phase winding 31v, and a W-phase winding 31w wound around the stator 30, respectively.

  A U-phase upper arm switching element 21 u and a U-phase lower arm switching element 22 u which are MOSFETs are mounted on the U-phase module 20 u. The source of the U-phase upper arm switching element 21u and the drain of the U-phase lower arm switching element 22u are connected, and the first end of the U-phase winding 31u is connected to the connection point. On the other hand, the second end of the U-phase winding 31 u is connected to the neutral point 32. In addition, the drain of the U-phase upper arm switching element 21u is connected to the positive electrode of the battery 10, and the source of the U-phase lower arm switching element 22u is grounded. A U-phase upper arm diode 23u and a U-phase lower arm diode 24u are connected in parallel in the opposite direction to the U-phase upper arm switching element 21u and the U-phase lower arm switching element 22u, respectively. The U-phase upper arm switching element 21u and the U-phase lower arm switching element 22u are controlled to be opened and closed by a U-phase drive circuit 25u.

  In addition, a U-phase upper arm temperature sensing diode 26u and a U-phase lower arm temperature sensing diode 27u are mounted on the U-phase module 20u. The U-phase upper arm temperature sensing diode 26u is mounted in the vicinity of the U-phase upper arm switching element 21u, and can detect a temperature change caused by heat generation of the U-phase upper arm switching element 21u. Similarly, the U-phase lower arm temperature sensing diode 27u is mounted in the vicinity of the U-phase lower arm switching element 22u, and can detect a temperature change caused by heat generation of the U-phase lower arm switching element 22u. The output values of the U-phase upper arm temperature sensing diode 26u and the U-phase lower arm temperature sensing diode 27u are input to the U-phase drive circuit 25u.

  The configurations of the V-phase module 20v and the W-phase module 20w are the same as those of the U-phase module 20u and the connection state of the V-phase winding 31v and the W-phase winding 31w is the same as that of the U-phase winding 31u. Therefore, the description thereof is omitted.

  The U-phase module 20u is provided with a U-phase connection terminal 28u for communicating with the V-phase module 20v and the W-phase module 20w. Similarly, the V-phase module 20v and the W-phase module 20w are provided with a V-phase connection terminal 28v and a W-phase connection terminal 28w, respectively. The U-phase drive circuit 25u, the V-phase drive circuit 25v, and the W-phase drive circuit 25w are communicably connected via a U-phase connection terminal 28u, a V-phase connection terminal 28v, and a W-phase connection terminal 28w, respectively. In addition, the W-phase module 20w is provided with a regulator connection terminal 29w, and the W-phase drive circuit 25w is connected to the regulator 40 via the regulator connection terminal 29w.

  The regulator 40 includes a field switching element 41, a diode 42, and a control unit 43. The regulator 40 controls the energization state of the rotor field winding 50. The field switching element 41 is, for example, a power MOSFET, the drain is connected to the positive electrode of the battery 10, and the source is connected to the cathode of the diode 42. The anode of the diode 42 is grounded. One end of the field winding 50 is connected to a connection point between the field switching element 41 and the diode 42, and the other end of the field winding 50 is grounded. The open / close state of the field switching element 41 is controlled by the control unit 43. Specifically, the control unit 43 changes the duty value indicating the ratio of the energization period in one control cycle (a constant period) of the field switching element 41.

  The control unit 43 is connected to the regulator connection terminal 29w of the W-phase module 20w via the module connection terminal 44, and communicates with the W-phase drive circuit 25w. The control unit 43 transmits drive commands for the switching elements 21u, 22u, 21v, 22v, 21w, and 22w to the W-phase drive circuit 25w. Specifically, the current value of the winding of each phase is input to the control unit 43, and each of the switching elements 21u, 22u, 21v, 22v, 21w, and 22w of each phase is either the upper arm or the lower arm. Whether to turn on. The W-phase drive circuit 25w drives the W-phase upper arm switching element 21w and the W-phase lower arm switching element 22w based on the drive command. In addition, the drive command is transmitted to the U-phase module 20u and the V-phase module 20v. Note that the drive circuits 25u, 25v, and 25w for each phase may execute the determination of which of the upper arm switching elements 21u, 21v, and 21w and the lower arm switching elements 22u, 22v, and 22w is turned on. Good.

  In addition, the W-phase drive circuit 25w acquires detection values of the respective temperature sensitive diodes 26u, 27u, 26v, 27v, 26w, and 27w, and selects the highest temperature among them to output to the control unit 43. Based on the acquired temperature, the control unit 43 acquires an upper limit Duty that is an upper limit of the Duty value and an upper limit time that is a time during which driving can be continued by the upper limit Duty.

  The upper limit Duty and the upper limit time will be described with reference to FIG. In FIG. 2, the horizontal axis represents temperature, and the vertical axis represents the upper limit time. When the upper limit Duty is 70%, the rated output is used. When the upper limit Duty is 70%, there is no time limit in driving the rotating electrical machine, and the upper limit time is set to infinity.

  When the upper limit Duty is 80%, if the temperature is lower than T1, the upper limit time is t11. If the temperature is equal to or higher than T1 and lower than T2, the upper limit time is t12 (<t11) and the temperature is T2. If it is above and is lower than T3, the upper limit time is t13 (<t12). If the temperature is equal to or higher than T3, the upper limit Duty is not set to 80%.

  When the upper limit Duty is 90%, if the temperature is lower than T1, the upper limit time is t21 (<t11), and if the temperature is equal to or higher than T1 and lower than T2, the upper limit time is t22 (<t12, t21). It is. If the temperature is equal to or higher than T2, the upper limit Duty is not set to 90%.

  When the upper limit Duty is 100% and the temperature is lower than T1, the upper limit time is t31 (<t21). Further, when the temperature is equal to or higher than T1, the upper limit Duty is not set to 100%.

  In addition, the case where the upper limit Duty is 70% is determined as the rated output, and when the upper limit Duty is 70%, the upper limit time is set to infinity.

  Therefore, if the temperature is lower than T1, the upper limit duty is 80% and the upper limit time is t11, the upper limit duty is 90% and the upper limit time is t21, and the upper limit duty is 100%. One of the controls with the upper limit time t31 is selected. If the temperature is equal to or higher than T1 and lower than T2, one of the control in which the upper limit Duty is 80% and the upper limit time is t12 and the control in which the upper limit Duty is 90% and the upper limit time is t22 is selected. The Rukoto. If the temperature is equal to or higher than T1 and lower than T2, one of the control in which the upper limit Duty is 80% and the upper limit time is t12 and the control in which the upper limit Duty is 90% and the upper limit time is t22 is selected. The Rukoto. If the temperature is equal to or higher than T2 and lower than T3, the control in which the upper limit Duty is 80% and the upper limit time is t13 is selected.

  The combination of the upper limit Duty and the upper limit time acquired based on the temperature is input to the ECU 100 that is a host control device. When the ECU 100 acquires a plurality of combinations of the upper limit duty and the upper limit time, the ECU 100 selects the upper limit duty and the upper limit time based on an operation request for the rotating electrical machine. The case where a plurality of combinations are acquired is a case where the temperature in FIG. 2 is lower than T2, but even when the temperature is T2 or higher and lower than T3, the upper limit Duty is 80% and the upper limit time is t13. Since a certain control and a control whose upper limit Duty is 70% (rated output) can be selected, it can be said that a plurality of combinations can be acquired. That is, the combination of the upper limit duty and the upper limit time includes a case where the upper limit duty is 70% (rated output) and the upper limit time is infinite, that is, the upper limit time is not set. The driving request for the rotating electrical machine includes a request based on the intention of the driver and a request based on the control state of the vehicle determined by the ECU 100.

  When applying a driving force to a vehicle using a rotating electrical machine as an electric motor, if the upper limit time is short, the upper limit time may elapse during the application of the driving force. In this case, as the upper limit time elapses, the upper limit Duty is set to 70% indicating the rated output, so that the driving force is reduced and the driver feels uncomfortable. Similarly, when performing regenerative power generation using a rotating electrical machine as a generator, if the upper limit time is short, the upper limit time may elapse during regenerative power generation, and the braking force due to regenerative power generation may decrease.

  Therefore, when the driving force is applied by using the rotating electrical machine as an electric motor and when the regenerative power generation is performed by using the rotating electrical machine as a generator, the ECU 100 has a longer upper limit time than that having a larger upper limit Duty. Select with priority. That is, if the temperature is lower than T1, control is selected such that the upper limit Duty is 80% and the upper limit time is t11 (> t21, t31), and if the temperature is equal to or higher than T1 and lower than T2, the upper limit Duty is 80. %, And the control whose upper limit time is t12 (> t22) is selected. Further, when the temperature is equal to or higher than T2 and lower than T3, the control may be selected such that the upper limit duty is 80% and the upper limit time is t13. In this case, the upper limit duty is set higher than the upper limit duty of the rated output. However, the upper limit Duty may be set to 70%, which is the upper limit Duty of the rated output.

  On the other hand, when the remaining capacity of the battery 10 is small, it is necessary to charge quickly by increasing the amount of power generation per hour by regenerative power generation. Therefore, when the remaining capacity of the battery 10 is small, priority is given to a battery having a large upper limit duty over a long upper limit time even when regenerative power generation is performed. That is, if the temperature is lower than T1, the control is selected such that the upper limit Duty is 100% and the upper limit time is t31 (<t11, t21). If the temperature is equal to or higher than T1 and lower than T2, the upper limit Duty is 90. % And the upper limit time t22 (<t12) is selected. If the temperature is equal to or higher than T2 and lower than T3, the upper limit duty is 80% and the upper limit time t13 is selected.

  In the above-described example, the case where the control with the smallest upper limit duty and the longest upper limit time is selected and the control with the largest upper limit duty and the smallest upper limit time are selected. The control selected is not limited to this. For example, depending on the control state of the rotating electrical machine, when the temperature is lower than T1, control with the upper limit Duty being 90% and the upper limit time being t21 may be selected.

  The ECU 100 transmits a command signal to the control unit 43 using the combination of the upper limit duty and the upper limit time thus selected so that the duty value becomes the upper limit duty. The control unit 43 obtains a duty value based on the received command signal and controls the field switching element 41. If the upper limit time is reached, the upper limit Duty is set to 70%, which is the rated output, and a command signal is transmitted to the control unit 43 of the rotating electrical machine.

  With the above configuration, the control device for the rotating electrical machine according to the present embodiment has the following effects.

  -When the temperature of each switching element 21u, 22u, 21v, 22v, 21w, 22w is low, since the upper limit Duty is made larger than the value of a rated output area, output power more than a rated output can be obtained.

  -The electric current which flows into each switching element 21u, 22u, 21v, 22v, 21w, 22w changes frequently with a driving | running state. Therefore, there may be a case where there is a margin in temperature and a case where the temperature is not. In this embodiment, since the upper limit duty which is the upper limit value of the duty value of the field winding 50 is changed in accordance with the temperature of each switching element 21u, 22u, 21v, 22v, 21w, 22w, the operation state is further increased. An appropriate upper limit Duty can be set.

  Since the upper limit duty and the upper limit time are associated with the temperature and the control is performed so that the drive time is within the upper limit time, the heat generation of each switching element 21u, 22u, 21v, 22v, 21w, 22w is excessive. It can be suppressed in advance.

  According to the control state of the rotating electrical machine, it is selected whether to give priority to the upper limit duty or to give priority to the upper limit time. For this reason, in a control state that requires continuous driving of the rotating electrical machine, control that prioritizes the upper limit time can be performed, and in a control state that requires a large current, control that prioritizes the upper limit duty can be performed. Therefore, it is possible to control according to the control state.

  ・ Vehicles include radiator fans as devices that consume large amounts of power, mainly in summer. On the other hand, as a device that consumes a large amount of power mainly in winter, a heater provided on a seat or the like can be cited. In this case, it is necessary to set the number of turns and the diameter of the field winding 50 so as to satisfy both. If the rated output is set based on the maximum value of the output power, the switching elements 21u, 22u, It is necessary to have a physique that satisfies the maximum values of 21v, 22v, 21w, and 22w. In this respect, in the present embodiment, particularly when the required power amount in winter is large, the switching elements 21u, 22u, 21v, 22v, 21w, and 22w have room in temperature, so that the switching elements 21u, 22u, 21v, and 22v are available. , 21w, 22w can be satisfied without increasing the physique more than necessary.

  Since the temperature in the vicinity of the switching elements 21u, 22u, 21v, 22v, 21w, and 22w of each phase is detected, the failure location can be specified by the temperature.

  The amount of power generation required for generating power with the rotating electrical machine changes as needed depending on the SOC of the battery 10 charged with the output power and various devices that use the output power. In the present embodiment, since the upper limit duty is changed, control within the range of the upper limit duty can be made possible.

  When the temperature is detected by the temperature sensitive diodes 26u, 27u, 26v, 27v, 26w, 27w, the detected temperature is output as a voltage value, and the temperature detection accuracy and responsiveness are high. Therefore, more precise and quick control can be performed.

  If the circuit for detecting the temperature is separately provided outside the modules 20u, 20v, and 20w on which the switching elements 21u, 22u, 21v, 22v, 21w, and 22w are mounted, the manufacturing cost increases. In the present embodiment, the temperature-sensitive diodes 26u, 27u, 26v, 27v, 26w, and 27w are also mounted on the substrate on which the switching elements 21u, 22u, 21v, 22v, 21w, and 22w are mounted, and are modularized. There is no need to provide a separate substrate on which the detection unit is mounted, and an increase in manufacturing cost can be suppressed.

  In the present embodiment, the modules 20u, 20v, and 20w are communicably connected to each other, and the W-phase module 20w is communicably connected to the regulator 40. Thereby, since one line which connects each module 20u, 20v, 20w and the regulator 40 is sufficient, manufacturing cost can be reduced.

  In the present embodiment, since the combination of the upper limit Duty and the duration is determined by the highest temperature among the temperatures detected by the temperature sensitive diodes 26u, 27u, 26v, 27v, 26w, 27w, The duty can be adjusted to the strict switching elements 21u, 22u, 21v, 22v, 21w, and 22w.

  In the present embodiment, only the highest temperature detected by the temperature sensitive diodes 26u, 27u, 26v, 27v, 26w, and 27w is transmitted from the W-phase module 20w to the regulator 40. The amount of information to be reduced can be reduced, and the processing in the control unit 43 can be simplified.

<Modification>
In the embodiment, the AC power is rectified using the switching elements 21u, 22u, 21v, 22v, 21w, and 22w as switching elements. However, the switching elements 21u, 22u, 21v, 22v, 21w, and 22w Instead, a diode may be used as a switching element.

  In the embodiment, the temperature of each switching element 21u, 22u, 21v, 22v, 21w, 22w is detected by using each of the temperature sensitive diodes 26u, 27u, 26v, 27v, 26w, 27w as a temperature detection unit. As the temperature detection unit, another element such as a thermistor may be used.

  In the embodiment, the temperature sensitive diodes 26u, 27u, 26v, 27v, 26w, and 27w are provided so as to correspond to the switching elements 21u, 22u, 21v, 22v, 21w, and 22w. , 20v, and 20w, one temperature sensitive diode may be provided.

  In the embodiment, the detected values of the temperature sensitive diodes 26u, 27u, 26v, 27v, 26w, and 27w are compared by the W-phase drive circuit 25w, and the highest value is transmitted to the regulator 40. A part or all of the detection values of the diodes 26u, 27u, 26v, 27v, 26w, and 27w may be transmitted to the regulator 40.

  In the embodiment, the inverter includes the U-phase module 20u, the V-phase module 20v, and the W-phase module 20w. However, in each phase, the inverter may be further modularized with an upper arm and a lower arm.

  In the embodiment, the W-phase module 20w and the regulator 40 are connected. However, the U-phase module 20u and the regulator 40 may be connected, or the V-phase module 20v and the regulator 40 may be connected. It is good. The modules 20u, 20v, and 20w may be connected to the regulator 40, respectively.

  In the embodiment, the value of the upper limit Duty is changed stepwise, but may be changed continuously. Further, the upper limit Duty may be changed in a binary manner. That is, when the detected temperature is lower than a predetermined value, the upper limit Duty may be set to 100%, and when the detected temperature is equal to or higher than the predetermined value, it may be a constant value less than 100%.

  In the embodiment, the upper limit Duty is changed according to the detected temperature, but energization based on the set Duty may be continued.

  In the embodiment, when the detected temperature is equal to or higher than t3, the rated output region is set and the upper limit Duty is not changed. However, when the detected temperature is larger than t3 and indicates that the overheat state is present, the upper limit Duty is set. May be set to a smaller value or power generation may be stopped.

  In the embodiment, the temperature of each switching element 21u, 22u, 21v, 22v, 21w, 22w is detected by each temperature-sensitive diode 26u, 27u, 26v, 27v, 26w, 27w. It is good also as what detects the temperature of a site | part.

  In FIG. 2, for example, the upper limit duty is 90% when t21 (the upper limit duty is 80% when the temperature is equal to or higher than T1 and lower than T2) than t12 (when the temperature is lower than T1). However, t21 may be larger than t12, and t12 and t21 may be equal. That is, the upper limit time is set shorter as the upper limit Duty is larger at a certain temperature, and the upper limit time only needs to be set shorter as the temperature is higher at a certain upper limit Duty.

  In the embodiment, the upper limit Duty is set at an interval of 10%, but this interval is not limited to that shown in the embodiment. That is, it is only necessary that the upper limit duty and the upper limit time have an inversely proportional relationship with respect to a certain temperature. Further, although the upper limit Duty of the rated output is 70%, it is not limited to this value.

  In the embodiment, the control state in which the upper limit time is given priority for driving and the control state in which the upper limit Duty is given priority for driving are illustrated, but the control state is not limited to that illustrated. Even when a rotating electrical machine is used as an electric motor, the amount of accelerator operation by the driver is greater than or equal to a predetermined value and a greater driving force is required, or the amount of brake operation by the driver is greater than or equal to a predetermined value and greater control is required. When power is required, the upper limit duty may be prioritized instead of the upper limit time.

  In the embodiment, the control unit 43 transmits the combination of the upper limit duty and the upper limit time to the ECU 100. However, the control unit 43 transmits the temperature to the ECU 100, and the upper limit duty is obtained based on the temperature acquired by the ECU 100. And a combination of the upper limit time and the combination used for control may be selected from the combination.

  -In embodiment, the control part 43 shall transmit the combination of upper limit Duty and upper limit time to ECU100, and the control part 43 shall acquire a command value from ECU100. In this regard, the control unit 43 may select any combination from the combination of the upper limit Duty and the upper limit time, and the control unit 43 may generate the command value. Alternatively, the control unit 43 may select a combination, transmit the selected combination to the ECU 100, and the ECU 100 may generate a command value based on the combination.

  -In embodiment, the control part 43 shall acquire the upper limit Duty which is an upper limit of a Duty value based on temperature. In this regard, when the rotating electrical machine is used as an electric motor, the upper limit value of the torque generated by the rotating electrical machine is acquired, and when the rotating electrical machine is used as a generator, the upper limit value of the generated current is acquired. It is good. In this case, the ECU 100 may calculate the duty value so as to be equal to or less than the upper limit value of the acquired torque or generated current, and transmit the duty value to the control unit 43 as a command value. Moreover, it is good also as what transmits the command value which is below the acquired torque or the upper limit of an electric current generation to the control part 43, and the control part 43 acquires a Duty value based on the command value.

  In the embodiment, an example in which the present invention is applied to a three-phase rotating electrical machine has been described, but the present invention can be similarly applied to multi-phase rotating electrical machines other than three-phase rotating electrical machines.

  In the embodiment, the rotating electrical machine is mounted on the vehicle, but the mounting target is not limited to the vehicle.

  20u ... U phase module, 20v ... V phase module, 20w ... W phase module, 21u ... U phase upper arm switching element, 21v ... V phase upper arm switching element, 21w ... W phase upper arm switching element, 22u ... U phase lower Arm switching element, 22v ... V-phase lower arm switching element, 22w ... W-phase lower arm switching element, 26u ... U-phase upper arm temperature sensing diode, 26v ... V-phase upper arm temperature sensing diode, 26w ... W-phase upper arm temperature sensing Diode, 27u ... U-phase lower arm temperature sensitive diode, 27v ... V-phase lower arm temperature sensitive diode, 27w ... W-phase lower arm temperature sensitive diode, 31u ... U-phase winding, 31v ... V-phase winding, 31w ... W-phase Winding, 43 ... control unit, 50 ... field winding, 100 ... ECU.

Claims (8)

Rotation comprising a multi-phase winding (31u, 31v, 31w) and a field winding (50), wherein energization of the multi-phase winding is controlled by switching elements (21u, 22u, 21v, 22v, 21w, 22w) An electric control device,
A temperature detector (26u, 27u, 26v, 27v, 26w, 27w) for detecting the temperature of a predetermined part of the rotating electrical machine;
Based on the temperature detected by the temperature detector, the duty value indicating the ratio of the energization period per predetermined period for the field winding, the torque when using the rotating electrical machine as an electric motor, and the rotating electrical machine as a generator A controller (43) that acquires at least one upper limit value of the generated current when used as an upper limit time that is a time during which driving at the upper limit value can be continued,
The upper limit is a larger value as the temperature is lower, and the upper limit time is a larger value as the temperature is lower.
The at least one of the duty value, the torque, and the generated current is communicably connected to another control device (100) that transmits a command value determined according to a request regarding the operation of the rotating electrical machine.
Wherein the control unit, the upper limit value and the upper limit time, then sent to the other control device, and, that controls the Duty value based on the command value received, rotating electrical machine control unit. The control unit acquires a plurality of combinations of the upper limit value and the upper limit time based on the temperature detected by the temperature detection unit, and transmits the plurality of combinations to the other control device,
The control device for a rotating electrical machine according to claim 1 , wherein the command value obtained by the combination selected based on a control state of the rotating electrical machine from the plurality of combinations is acquired from the other control device. . The temperature detecting unit is a temperature-sensitive diode, a motor controller according to claim 1 or 2. The said temperature detection part is a control apparatus of the rotary electric machine of any one of Claims 1-3 which detects the temperature of the said switching element as the said predetermined part. The temperature detection unit is configured as a module (20u, 20v, 20w) by being mounted on a common substrate with the switching element for each phase, and has means for transmitting the temperature from the module to the control unit. The control apparatus of the rotary electric machine according to claim 4 . The control device for a rotating electrical machine according to claim 5 , further comprising means for acquiring a temperature of another module and transmitting the temperature from the module to the control unit. The control device for a rotating electrical machine according to claim 6 , wherein the temperature transmitted from the module to the control unit is a highest temperature among a plurality of detected temperatures. The rotating electrical machine according to any one of claims 1 to 7 , wherein the control unit makes a control cycle constant and switches the duty value in a stepwise manner with respect to an energization period of the field winding. Control device.

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