CN104272582B - The power control of electric rotating machine - Google Patents

Abstract

The present invention provides the power control of a kind of electric rotating machine, possesses: TRC optimum voltage output unit (21) and GEN optimum voltage output unit (22), and it obtains TRC optimum voltage and GEN optimum voltage；Generally target voltage output unit (23), it, based on voltage the highest in the middle of TRC optimum voltage and GEN optimum voltage, is set by the public usual target voltage being applied to electric drive motor system and generating electric motor system of DC/DC changer；And temperature protection target voltage output unit (24) and target voltage output unit (25); its difference delta V between TRC optimum voltage and GEN optimum voltage is in the case of the state of more than setting continue for the stipulated time more than and ATF temperature is more than set point of temperature, and the public voltage being applied to electric drive motor system and generating electric motor system is limited to less than usual target voltage.

Description

The power control of electric rotating machine

Technical field

The present invention relates to the power control of a kind of electric rotating machine.

The application is main based on Japanese Patent Application 2012-109544 application submitted on May 11st, 2012 Open priority, and here cite its content.

Background technology

In the past, for example, as it is known that possess traveling that the driving wheel to vehicle is driven with electronic a kind of Machine and with the internal combustion engine of vehicle link generating motor, each motor is controlled based on The inverter of pulse width modulation, DC voltage to DC source boost and are supplied to each inversion In the in-line hybrid electric vehicle of the booster converter of device, for each motor, perform by basis The magnet temperature of each motor makes the output voltage of booster converter reduce so that magnet temperature drops The power control (for example, with reference to patent documentation 1) of the electric rotating machine of low process.

Citation

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 2008-206339 publication

The problem that invention is to be solved

According to the power control of the electric rotating machine involved by above-mentioned prior art, due to for 2 Inverter, the output voltage (the namely DC voltage of 2 inverters) of booster converter is public Common, if therefore coming according to the magnet temperature of any one of electric drive motor and generating motor Control the output voltage of booster converter, though then exist output voltage for electric drive motor and One of generating motor is suitable, and situation the most inappropriate for another output voltage such as can There is magnet temperature in another motor excessively to rise or the output of another motor is by excessively Limit the anxiety of such undesirable condition generation.

Summary of the invention

Mode involved in the present invention is made in view of the foregoing, its object is to, it is provided that Yi Zhongneng Enough prevent multiple motor overheated while guarantee the electric rotating machine of desired output efficiently Power control.

Solve the means of problem

The present invention is to solve above-mentioned problem and reach involved purpose, have employed following mode.

(1) power control of the electric rotating machine of a mode involved in the present invention possesses: many Individual dynamo-electric machine system, its respectively by electric rotating machine and perform that the energising of this electric rotating machine controls logical Electric control unit is constituted；Target voltage setup unit, it is applied to the plurality of described rotation to public The target voltage of electric system is set；Voltage control unit, it will be set by described target voltage The described target voltage that unit sets is applied to the plurality of described dynamo-electric machine system；Optimum voltage obtains Take unit, its obtain in each of the plurality of described dynamo-electric machine system described electric rotating machine with And at least any one the optimum voltage in the middle of described energising control unit；And limiting unit, its meter Calculate the difference between described target voltage and described optimum voltage, in the feelings that this difference is more than setting Under condition, described voltage control unit the voltage being applied to the plurality of described dynamo-electric machine system is limited It is made as less than described target voltage.

(2) in the mode of above-mentioned (1), described target voltage setup unit can also be based on by institute State described optimal electricity the highest in the middle of the multiple described optimum voltage that optimum voltage acquiring unit gets Pressure, sets described target voltage, and described limiting unit can also calculate the plurality of described optimal electricity Pressure difference each other, in the case of this difference is more than setting, will be by described Control of Voltage Unit is applied to the voltage of the plurality of described dynamo-electric machine system and is limited to less than described target voltage.

(3) in the mode of above-mentioned (1) or (2), described limiting unit can also be described Difference is the situation that temperature is more than set point of temperature of more than described setting and described electric rotating machine Under, the voltage being applied to the plurality of described dynamo-electric machine system is limited.

(4) in the mode of above-mentioned (3), described limiting unit can also be by described electric rotating machine Temperature is set as and the temperature being substantially the same the temperature of the coolant that this electric rotating machine cools down Degree.

Invention effect

According to the mode of above-mentioned (1), the difference between target voltage and optimum voltage is less than regulation In the case of value, it is believed that the most do not produce excessive heating in any one of multiple dynamo-electric machine systems, Thus, in the case of need not the voltage being applied to dynamo-electric machine system is limited, it becomes possible to Operate multiple dynamo-electric machine system efficiently.

Further, in the case of the difference between target voltage and optimum voltage is more than setting, recognize For being likely to produce excessive heating in any one of multiple dynamo-electric machine systems, thus, pass through The voltage being applied to multiple dynamo-electric machine system is limited to less than target voltage such that it is able to anti-spin-ended Rotating motor control system becomes superheat state.

In the case of above-mentioned (2), in multiple optimum voltages difference each other less than setting In the case of, it is believed that the most do not produce excessive heating in any one of multiple dynamo-electric machine systems, by This, by carrying out target setting voltage based on the highest optimum voltage, it is possible to operate multiple rotation efficiently Electric system.

Further, in the case of multiple optimum voltages difference each other is more than setting, it is believed that It is likely to produce excessive heating in any one of multiple dynamo-electric machine systems, thus, by will The voltage being applied to multiple dynamo-electric machine system is limited to less than target voltage such that it is able to prevent from rotating Electric machine control system becomes superheat state.

In the case of above-mentioned (3), owing to being regulation in multiple optimum voltages difference each other More than value, and the temperature of electric rotating machine is restriction voltage in the case of more than set point of temperature, therefore can Enough prevent with excessive frequency to limit voltage, and can suitably prevent control system of dynamo electric machine Overheated.

In the case of above-mentioned (4), it is possible to easily and accurately obtain the temperature of electric rotating machine.

Accompanying drawing explanation

Fig. 1 is the structure chart of the power control of the electric rotating machine involved by embodiments of the present invention.

Fig. 2 is the power control of the electric rotating machine involved by embodiments of the present invention The structure chart of MGECU.

Fig. 3 A is to represent and the power control of the electric rotating machine involved by embodiments of the present invention Electric drive motor system in torque and the figure of example of the corresponding optimum voltage of rotating speed.

Fig. 3 B is to represent and the power control of the electric rotating machine involved by embodiments of the present invention Generating electric motor system in torque and the figure of example of the corresponding optimum voltage of rotating speed.

Fig. 4 A is the power control representing the electric rotating machine involved by embodiments of the present invention The figure of the example of the variations in temperature in generating electric motor system.

Fig. 4 B is the power control representing the electric rotating machine involved by embodiments of the present invention The figure of the example of the variations in temperature in electric drive motor system.

Detailed description of the invention

Below, referring to the drawings, electric rotating machine involved by an embodiment of the invention is described Power control.

The power control 10 of electric rotating machine based on present embodiment is loaded on such as Fig. 1 institute The hybrid electric vehicle 1 shown, this hybrid electric vehicle 1 is such as electric drive motor (TRC) 11 and drive Driving wheel W links, the arbor 12a of internal combustion engine (ENG) 12 uses motor (GEN) 13 with generating electricity The in-line hybrid electric vehicle linked.

Each motor 11,13 is the DC brushless motor etc. of such as 3 phases, with to each motor 11, 13 the first and second power drive assem (PDU) 14,15 being controlled connect.

Each PDU14,15 being configured to possess PWM inverter, this PWM inverter possesses such as to be made Bridge circuit that electric bridge is formed by connecting is carried out and based on pulse width with switch elements such as multiple transistors Degree modulation (PWM).

Further, each PDU14,15 via such as DC/DC changer 16 and battery (BATT) 17 connect.

DC/DC changer 16 such as the voltage between terminals of battery (BATT) 17 can be boosted or Person be depressured to regulation voltage and be applied to each PDU14,15, and can by each PDU14,15 Voltage between terminals (DC voltage) blood pressure lowering or boost to regulation voltage and battery 17 is entered Row charging.

Further, such as when the driving of electric drive motor 11, a PDU14 will be from DC/DC The direct current power that 2nd PDU15 of changer 16 or generating motor 13 provides is converted to hand over Stream electric power, and it is supplied to electric drive motor 11.

Additionally, such as at the power by internal combustion engine 12, generating motor 13 carries out the feelings generated electricity Under condition, the generation power of the exchange exported from generating motor 13 is converted to directly by the 2nd PDU15 Stream electric power, and via DC/DC changer 16, battery 17 is charged or to travelling electricity consumption Oneth PDU14 of motivation 11 provides electric power.

If additionally, such as when the deceleration of hybrid electric vehicle 1 etc., laterally travelling use from driving wheel W Motor 11 side transmission driving force, then electric drive motor 11 works as electromotor and produces So-called regenerative braking force, reclaims the kinetic energy of car body as electric energy.In this electric drive motor 11 Generating time, a PDU14 is by the generating (regeneration) of the exchange exported from electric drive motor 11 Electric power is converted to direct current power, and charges to battery 17 via DC/DC changer 16.

Further, the power control 10 of electric rotating machine such as possesses to enter hybrid electric vehicle 1 The MGECU18 that row is uniformly controlled, as by CPU (Central Processing Unit, centre Reason unit) etc. electronic circuit constitute ECU (Electronic Control Unit: electronic control unit),.

MGECU18 is such as in figure 2 it is shown, be configured to possess: TRC optimum voltage output unit 21, GEN optimum voltage output unit 22, usual target voltage output unit 23, temperature protection target voltage Output unit 24, target voltage output unit 25, rate limit (rate limit) portion 26, bound limit Portion 27 processed.

TRC optimum voltage output unit 21 is such as based on for making by electric drive motor 11 and first The running loss of the electric drive motor system (dynamo-electric machine system) that PDU14 is constituted is minimum electricity Source voltage (TRC optimum voltage, the namely optimum voltage of the DC voltage of a PDU14) And the data of regulation mapping (map) set in advance etc., to the operating shape according to hybrid electric vehicle 1 State etc. and to electric drive motor 11 require torque (TRC torque) and rotating speed (TRC rotating speed) Corresponding TRC optimum voltage obtains, and exports this acquisition result.

It addition, regulation set in advance maps the most as shown in Figure 3A, it is to represent electric drive motor The data of the corresponding relation between the torque of 11 and rotating speed and TRC optimum voltage, are stored in TRC optimum voltage output unit 21.

It addition, TRC optimum voltage can also be such as to make electric drive motor 11 and first At least any one running loss in the middle of PDU14 is minimum supply voltage.

GEN optimum voltage output unit 22 is such as based on making for by generating motor 13 and second The running loss of the generating electric motor system (dynamo-electric machine system) that PDU15 is constituted is minimum electricity Source voltage (GEN optimum voltage, the namely optimum voltage of the DC voltage of the 2nd PDU15) And the data of regulation mapping set in advance etc., to operating condition according to hybrid electric vehicle 1 etc. and right Torque (GEN torque) and rotating speed (GEN rotating speed) that generating requires with motor 13 are corresponding GEN optimum voltage obtain, and export this acquisition result.

It addition, regulation set in advance maps the most as shown in Figure 3 B, it is to represent generating motor The data of the corresponding relation between the torque of 13 and rotating speed and GEN optimum voltage, are stored in GEN optimum voltage output unit 22.

It addition, GEN optimum voltage can also be such as to make generating motor 13 and second At least any one running loss in the middle of PDU15 is minimum supply voltage.

The TRC that generally target voltage output unit 23 such as will export from TRC optimum voltage output unit 21 Optimum voltage is the highest with in the middle of the GEN optimum voltage of GEN optimum voltage output unit 22 output Voltage exports as usual target voltage.

Temperature protection target voltage output unit 24 is such as configured to possess: voltage difference operational part 31, It is defeated that voltage difference triggers intervalometer the 32, first output switching portion 33, ATF temperature judging part 34, second Go out switching part 35, rate limit portion 36.

Voltage difference operational part 31 is such as optimal to the TRC exported from TRC optimum voltage output unit 21 Voltage and difference delta V between the GEN optimum voltage of GEN optimum voltage output unit 22 output Calculate, and export result of calculation.

Voltage difference trigger intervalometer 32 such as to difference delta V export from voltage difference operational part 31 for advise Whether state more than definite value continue for stipulated time judgement carried out above, and exports this judged result.

First output switching portion 33 such as triggers, according to from voltage difference, the judged result that intervalometer 32 exports, The voltage between terminals of the primary side for DC/DC changer 16 (is namely applied to each PDU14, the voltage of 15) 2 different magnitudes of voltage, the temperature protection voltage namely specified The selection of any one in the middle of instruction limits value and voltage instruction maximum switches over, and exports choosing Select result.

Such as, it is being judged as that the state that difference delta V is more than setting continue for the stipulated time more than In the case of, the first output switching portion 33 selects and exports the temperature protection voltage instruction of regulation to limit Value, be not judged as that the state that difference delta V is more than setting continue for the situation of stipulated time more than Under, select and export the voltage instruction maximum of regulation.

It addition, the temperature protection of regulation voltage instruction limits value is e.g. used for electric drive motor The temperature limiting of system and generating electric motor system is the limits value of the ceiling temperature less than regulation Deng, there is the value less than the usual target voltage exported from usual target voltage output unit 23.

Additionally, regulation voltage instruction maximum for example as DC/DC changer 16 time The target voltage of the voltage between terminals of level side, it is possible to the maximum etc. of setting.

ATF temperature judging part 34 such as each motor 11,12 and each PDU14,15 In the middle of the relevant ATF temperature of at least any one temperature (it is to say, to electric drive motor System and generating electric motor system carry out the temperature of the coolant cooled down) detected value or push away Whether disconnected values etc., be set point of temperature judgement carried out above to ATF temperature, and export judged result.

It addition, set point of temperature can also have hysteresis, such as, ATF temperature judging part 34 exists It is judged as that ATF temperature, less than in the case of set point of temperature, is the first temperature specified in ATF temperature It is judged as in the case of above that ATF temperature is more than set point of temperature, is being judged as that ATF temperature is for rule In the case of more than fixed temperature, in ATF temperature less than second temperature lower than the first temperature of regulation In the case of, it is judged that for ATF temperature less than set point of temperature.

Second output switching portion 35 judged result that such as basis exports from ATF temperature judging part 34, The voltage between terminals of the primary side for DC/DC changer 16 (is namely applied to each PDU14, the DC voltage of DC side of 15) 2 magnitudes of voltage, namely from the first outputting cutting Change the selection of any one in the middle of the magnitude of voltage of portion 33 output and the voltage instruction maximum of regulation to enter Row switching, and export selected results.

Such as, in the case of being judged as that ATF temperature is more than set point of temperature, the second output switching Portion 35 selects and exports the magnitude of voltage from the output of the first output switching portion 33, be not judged as ATF (that is in ATF temperature less than the feelings of set point of temperature in the case of temperature is more than set point of temperature Under condition), select and export the voltage instruction maximum of regulation.

Rate limit portion 36, will change such as the magnitude of voltage from the output of the second output switching portion 35 Rate is defined to regulation rate of change, and is come as temperature protection target voltage by the magnitude of voltage after this restriction Output.

The usual target that target voltage output unit 25 such as will export from usual target voltage output unit 23 Voltage with in the middle of the temperature protection target voltage that temperature protection exports by target voltage output unit 24 Minimum voltage exports as target voltage.

Rate limit portion 26, such as the target voltage exported from target voltage output unit 25, will become Rate is limited to regulation rate of change, and exports the target voltage after this restriction.

Bound limiting unit 27 is such as the target voltage exported from speed limiting unit 26, in restriction Limit value and lower limit, and export the target voltage after this restriction.

Further, MGECU18 such as according to for each PDU14,15 DC voltage (the most just Be to say, the secondary-side voltage of DC/DC changer 16) target voltage, come to each PDU14,15 And the electric power switching motion of DC/DC changer 16 is controlled.Further, to electric drive motor The driving of 11 and generating, the generating of generating motor 13 of power based on internal combustion engine 12 are carried out Control.

The power control 10 of the electric rotating machine of present embodiment possesses said structure, it follows that Action to the power control 10 of electric rotating machine, the particularly process of target setting voltage are carried out Explanation.

From the TRC optimum voltage of TRC optimum voltage output unit 21 output as hybrid electric vehicle 1 Operating condition, according to such as being changed by accelerator pedal aperture of operator etc..

On the other hand, from the GEN optimum voltage conduct of GEN optimum voltage output unit 22 output The operating condition of hybrid electric vehicle 1, the most as shown in Figure 3 B, (has according to the BSFC of internal combustion engine 12 Effect fuel consumption: Brake Specific Fuel Consumption) for optimum operating condition etc. Change.

Further, from the temperature protection target voltage of temperature protection target voltage output unit 24 output Difference delta V between such as TRC optimum voltage and GEN optimum voltage is the shape of more than setting In the case of state continue for the stipulated time more than, and ATF temperature is more than set point of temperature, become Regulation temperature protection voltage instruction limits value, in addition in the case of, become the voltage of regulation Instruction maximum.

Low rotation speed area (regulation rotating speed relative to the electric drive motor 11 shown in such as Fig. 3 A N1 etc.) in regulation output W1 under the situation that TRC optimum voltage is assigned voltage V1, in example The BSFC according to internal combustion engine 12 as shown in Figure 3 B is optimum operating condition, generating motor In the case of GEN optimum voltage under the regulation output W1 of 13 is assigned voltage V1 etc., TRC Difference delta V between optimum voltage and GEN optimum voltage is less than setting.

Further, at least in the case of difference delta V is less than setting, from usual target voltage output unit The usual target voltages of 23 outputs become realize such as according to the traveling of accelerator pedal aperture etc. with electronic The operating condition of machine system and the BSFC of such as internal combustion engine 12 are optimum generating motor system The voltage of the operating condition the two operating condition of system.

Now, from the temperature protection target voltage of temperature protection target voltage output unit 24 output For regulation voltage instruction maximum, if this voltage instruction maximum is set to more optimal electricity than TRC Pressure and the big value of GEN optimum voltage, then the target voltage from target voltage output unit 25 output becomes For the usual target voltage exported from usual target voltage output unit 23.

On the other hand, relative to the high speed area (rule of the electric drive motor 11 shown in such as Fig. 3 A Determine rotating speed N2 etc.) in TRC optimum voltage under regulation output W1 become the feelings of assigned voltage V3 Condition, is optimum operating condition at the BSFC according to internal combustion engine 12 shown in such as Fig. 3 B, generating The situation that GEN optimum voltage is assigned voltage V1 etc. under W1 is exported by the regulation of motor 13 Under, difference delta V between TRC optimum voltage and GEN optimum voltage is more than setting.

Further, continue for the stipulated time more than in the state that difference delta V is more than setting, and ATF In the case of temperature is more than set point of temperature, have leading to from the output of usual target voltage output unit 23 Often target voltage travel electricity consumption motivational system and generating electric motor system any one (such as, One that optimum voltage is less etc.) make the anxiety of excessive heating generation.

Now, from the temperature protection target voltage of temperature protection target voltage output unit 24 output It is the temperature protection voltage instruction limits value of regulation, by electric drive motor system and generating electricity consumption The temperature limiting of motivational system is the ceiling temperature less than regulation, and ratio is from usual target voltage output unit 23 The usual target voltage of output is little, becomes from temperature from the target voltage of target voltage output unit 25 output The temperature protection target voltage of degree protection target voltage output unit 24 output.

It is to say, difference delta V between TRC optimum voltage and GEN optimum voltage is regulation In the case of value is above, it is applied to electric drive motor system and the voltage of generating electric motor system It is limited to less than usual target voltage.

Such as in Fig. 4 A, 4B, represent in TRC optimum voltage to be assigned voltage Va and GEN Optimum voltage is assigned voltage Vf, and difference delta V is under the operating condition of more than setting, according to from temperature The temperature protection target voltage that degree protection exports by target voltage output unit 24, target voltage is from rule Determine the generating electric motor system in the case of voltage Va is slowly decreased to assigned voltage Vf (＜ Va) Temperature (GEN temperature) and the change of temperature (TRC temperature) of electric drive motor system An example.

It is such as in the case of the value of the assigned voltage Va of TRC optimum voltage at target voltage, Owing to GEN temperature and TRC temperature are in a ratio of high temperature, therefore ATF temperature become set point of temperature with On.In this case, the temperature protection exported by target voltage output unit 24 from temperature protection is used Target voltage is the temperature protection voltage instruction limits value of regulation, defeated from target voltage output unit 25 The target voltage gone out becomes the temperature protection mesh from the output of temperature protection target voltage output unit 24 Mark voltage.

Further, if according to the temperature protection mesh exported from temperature protection target voltage output unit 24 Mark voltage, target voltage is slowly decreased to assigned voltage Vf (＜ Va), then phase from assigned voltage Va Being changed with reduction trend for GEN temperature, TRC temperature is nearly constant.

Along with this situation, such as, it is the assigned voltage close to GEN optimum voltage at target voltage In the case of the value of Vf, owing to GEN temperature is almost equal with TRC temperature, therefore ATF temperature Not up to set point of temperature.In this case, export from temperature protection target voltage output unit 24 Temperature protection target voltage be regulation voltage instruction maximum, from target voltage output unit 25 The target voltage of output becomes the usual target voltage from the output of usual target voltage output unit 23.

In sum, according to the power control 10 of electric rotating machine based on present embodiment, Difference delta V between TRC optimum voltage and GEN optimum voltage, less than in the case of setting, is recognized For the most not producing excessive in any one travelling electricity consumption motivational system and generating electric motor system Heating, thus, by carrying out target setting voltage based on the highest optimum voltage, it is possible to operate efficiently Electric drive motor system and generating electric motor system.

Further, in the case of difference delta V is more than setting, it is believed that travelling electricity consumption motivational system And any one of generating electric motor system is likely to excessive heating, thus, by applying Primary side to the DC/DC changer 16 of electric drive motor system and generating electric motor system Voltage between terminals be limited to less than target voltage such that it is able to prevent electric drive motor system and Generating electric motor system becomes superheat state.

Further, it is more than setting in difference delta V, and ATF temperature is more than set point of temperature In the case of, by the target of the voltage between terminals to the primary side relative to DC/DC changer 16 Voltage limits, it is possible to prevents with excessive frequency limited target voltage, and can suitably prevent Electric drive motor system and generating electric motor system overheated.

Further, by ATF temperature, it is possible to easily and accurately obtain and travel with electronic Machine system and the temperature of generating electric motor system, by each motor 11,13 and each PDU14, 15 entirety can be appropriately carried out temperature protection.

It addition, in the above-described embodiment, the power control 10 of electric rotating machine also not only limits In electric drive motor 11 and generating motor 13, it is also possible to possess multiple rotations that load is different Rotating motor and carry out these electric rotating machines energising control multiple power drive assem (PDU), And carry out target setting voltage according to this multiple optimum voltages difference each other.

It addition, in the above-described embodiment, hybrid electric vehicle 1 is not limited in tandem, it is possible to Being that such as there is tandem and the hybrid electric vehicle of both functions parallel or power distribution formula Hybrid electric vehicle etc..

Additionally, the power control 10 of electric rotating machine is not limited in being loaded into hybrid electric vehicle 1, Can also be loaded into such as that electric drive motor (TRC) 11 is electronic with what driving wheel W was connected Car.

It addition, in the above-described embodiment, usual target voltage output unit 23 is the most electric by TRC In the middle of pressure and GEN optimum voltage, the highest voltage is set to usual target voltage, it is not limited to This, it is also possible to set based on the highest voltage in the middle of TRC optimum voltage and GEN optimum voltage Target voltage.

It addition, in the above-described embodiment, ATF temperature judging part 34 can also be by ATF temperature It is set as in the middle of the most each motor 11,12 and each PDU14,15 at least any one temperature Detected value or estimated value etc..

It addition, in the above-described embodiment, at the target electricity exported from target voltage output unit 25 Pressure is set to the temperature protection target voltage from the output of temperature protection target voltage output unit 24 In the case of, it is also possible to each PDU14,15 PWM inverter in, make carrier frequency in unit Part temperature increases less than in the range of the ceiling temperature of regulation.

Although it addition, in the above-described embodiment, in TRC optimum voltage and GEN optimum voltage Between difference delta V be more than setting in the case of, will be applied to electric drive motor system and The voltage of generating electric motor system is limited to less than usual target voltage, but defeated at usual target voltage Go out voltage the highest in the middle of TRC optimum voltage and GEN optimum voltage in portion 23 as usual mesh In the case of mark voltage exports, voltage difference operational part 31 difference delta V calculated becomes target electricity Pressure (namely from the usual target voltage of usual target voltage output unit 23 output) and optimum voltage Difference between (namely TRC optimum voltage and GEN optimum voltage any one little voltage central) Point.

Based on this, in the above-described embodiment, it is also possible to calculate target voltage (such as, by generally The usual target voltage of target voltage output unit 23 output) (such as, TRC is optimal with optimum voltage Any one little voltage in the middle of voltage and GEN optimum voltage) between difference, be rule in this difference In the case of more than definite value, electric drive motor system and generating electric motor system will be applied to Voltage is limited to less than target voltage.

Symbol description:

1 hybrid electric vehicle

The power control of 10 electric rotating machines

11 electric drive motor (electric rotating machine)

12 internal combustion engines

13 generating motor (electric rotating machine)

14 the oneth PDU (energising control unit)

15 the 2nd PDU (energising control unit)

16 DC/DC changers (voltage control unit)

18 MGECU

21 TRC optimum voltage output units (optimum voltage acquiring unit)

22 GEN optimum voltage output units (optimum voltage acquiring unit)

23 usual target voltage output units (target voltage setup unit)

24 temperature protection are with target voltage output unit (limiting unit)

25 target voltage output units (limiting unit)

33 first output switching portions

35 second output switching portions

Claims (3)

1. the power control of an electric rotating machine, it is characterised in that possess:

Multiple dynamo-electric machine systems, it is respectively by electric rotating machine and the channel electric controlled that performs this electric rotating machine The energising control unit of system is constituted；

Target voltage setup unit, it is to the public target electricity being applied to the plurality of dynamo-electric machine system Pressure is set；

Voltage control unit, described target voltage setup unit the described target voltage set is executed by it Add to the plurality of dynamo-electric machine system；

Optimum voltage acquiring unit, it obtains institute in each of the plurality of dynamo-electric machine system State corresponding to the torque of electric rotating machine requirement and rotating speed, described electric rotating machine and described channel electric controlled At least any one optimum voltage in the middle of unit processed；With

Limiting unit, it is applied to the plurality of dynamo-electric machine system to by described voltage control unit Voltage limits,

Described target voltage setup unit is multiple based on got by described optimum voltage acquiring unit Described optimum voltage the highest in the middle of described optimum voltage, sets described target voltage,

Described limiting unit calculates the plurality of optimum voltage difference each other, is rule in this difference In the case of more than definite value, the plurality of dynamo-electric machine system will be applied to by described voltage control unit Voltage be limited to less than described target voltage.

The power control of electric rotating machine the most according to claim 1, it is characterised in that

Stipulated time more than and described rotation is continue in the state that described difference is more than described setting In the case of the temperature of rotating motor is more than set point of temperature, described limiting unit is the plurality of to being applied to The voltage of dynamo-electric machine system limits.

The power control of electric rotating machine the most according to claim 2, it is characterised in that

The temperature of described electric rotating machine is set as and carries out cold to this electric rotating machine by described limiting unit The temperature that the temperature of coolant but is substantially the same.