Summary of the invention
The invention provides a kind of electronlmobil Double Motor Control System, realize the time-sharing work of two motors, not only can protect motor but also can save electric energy to greatest extent.
For achieving the above object, the invention provides a kind of electronlmobil Double Motor Control System, its technical scheme is:
Comprise: controller unit, first driver element, second driver element, first motor and second motor;
Described controller unit receives vehicle speed signal and throttle signal, and when throttle signal was effective, according to the size of vehicle speed signal, controller unit was controlled the mode of operation of first driver element and second driver element to realize first motor or second machine operation.
Preferably, described first driver element and second driver element are respectively first relay and second relay, are connected with first relay and second relay respectively between the input end of described first motor, second motor and the three-phase output end of three-phase voltage type rectifier.
Preferably, described three-phase voltage type rectifier is the half bridge rectifier of six road IGBT modules, and described controller unit is controlled the conducting state of six road IGBT modules.
Preferably, described first motor is permagnetic synchronous motor, and described second motor is dc brushless motor.
Preferably, described control system comprises velocity checking circuits, and described controller unit receives vehicle speed signal by the motor signal processing circuit.
Preferably, described control system connects entire car controller by the CAN communicating circuit, thereby obtains throttle signal.
Preferably, also comprise the temperature sensing circuit that is connected with controller unit, for detection of the temperature signal of six road IGBT modules.
Preferably, also comprise one of the bus voltage testing circuit that is connected with controller unit, power module, current detection circuit or their combination.
In addition, the present invention also provides a kind of motor control method of electronlmobil, comprising:
Obtain vehicle speed signal, and obtain throttle signal;
When throttle signal is effective, if vehicle speed signal greater than the preset vehicle speed value, then drives first machine operation, otherwise, drive second machine operation.
The present invention compared to the beneficial effect of present technology is:
The present invention adopts two motors at electronlmobil; like this; two motors can be selected different rating horsepowers for use; adopt the speed of a motor vehicle and throttle signal as judging signal simultaneously; judge according to the program set in the controller unit to allow which machine operation, realized that the work of double-motor is switched, realize time-sharing work; both play the function of protection motor, saved electric energy again to greatest extent.
The specific embodiment
For above-mentioned purpose, the feature and advantage that make invention can become apparent more, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
A lot of details have been set forth in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from alternate manner described here and implement, those skilled in the art can do similar popularization under the situation of intension of the present invention, so the present invention is not subjected to the restriction of following public specific embodiment.
With reference to shown in Figure 1, in this embodiment, controller unit is Central Processing Unit (CPU) 100, it for example is dsp system, it is connected with communication module 310, motor signal processing module 320, current detection module 330, bus voltage detection module 350 and power-switching circuit module 360, and output has multi-path signal 1U, 2U, 1V, 2V, 1W, 2W, X1, X2, these signals are respectively applied to control the mode of operation of first driver element and second driver element and the mode of operation of the driver module of the three-phase voltage type rectifier that is connected with second motor with first motor, to realize the work of first motor or second motor respectively.
In the present embodiment, Central Processing Unit (CPU) 100 receives vehicle speed signal by motor signal processing circuit 320, and be connected to entire car controller by the CAN communicating circuit, obtain throttle signal from entire car controller, certainly, can also obtain vehicle speed signal and throttle signal by different modes according to concrete design and needs.
With reference to shown in Figure 2, in this embodiment, three-phase voltage type rectifier 260 is the half bridge rectifier of six road IGBT modules, its input end P, N and battery unit join, first driver element 210 is first relay, second driver element 220 is second relay, first motor 230 is permagnetic synchronous motor, second motor 240 is dc brushless motor, permagnetic synchronous motor has higher rating horsepower than dc brushless motor usually, in one embodiment, the rating horsepower of permagnetic synchronous motor is preferably 25KW, the rating horsepower of dc brushless motor 4 is 5KW, the three-phase output end U of three-phase voltage type rectifier 260, V, W is connected with the three-phase input end of permagnetic synchronous motor 230 through first relay R 1 respectively, be connected with the input end of dc brushless motor through second relay R 2, the input end that wherein flows brushless motor is the port before the AC-DC conversion.Be understandable that first motor and second motor can be selected dissimilar motors as required, first driver element and second driver element also can be other automatically controlled on-off element, as pliotron etc.
Controller unit 100 receives throttle signal and vehicle speed signal, when throttle signal is effective, be throttle when output is arranged, the vehicle speed value of vehicle speed signal is greater than the preset vehicle speed value, as greater than 15 kilometers/hour, at this moment, controller unit 100 is controlled six road IGBT module conductings by control signal 1U, 2U, 1V, 2V, 1W, 2W, and controls 1 conducting of first relay R by control signal X1, and the 2 not conductings of the second relay relay R, like this, permagnetic synchronous motor 230 is in running order; Otherwise, when the vehicle speed value of vehicle speed signal less than the preset vehicle speed value, as less than 15 kilometers/hour, at this moment, controller unit 100 control signal 1U, 2U, 1V, 2V, 1W, 2W control six road IGBT module conductings, and control 2 conductings of second relay R by control signal X2, and the 1 not conducting of first relay R, like this, dc brushless motor is in running order.Thereby; by vehicle speed signal and throttle signal; control the mode of operation of first and second relays by controller unit, select suitable machine operation, realize time-sharing work; can protect permagnetic synchronous motor to greatest extent; avoid under the low speed situation, big electric current is for the frequent impact of permagnetic synchronous motor, simultaneously; also use low power dc brushless motor under the low speed situation, can start more fast and can farthest save electric energy.
As can be seen from Figure 1, more function that the control module of present embodiment is integrated in control first motor and the second motor time-sharing work, can also have overvoltage, under-voltage, overcurrent, short circuit and overheat protector function.
Wherein, communication module 310 has been realized the communication of Central Processing Unit (CPU) 100 by the CAN communicating circuit, can transmit outside signal and enter Central Processing Unit (CPU), and the data message of this Central Processing Unit (CPU) 100 is sent to the entire car controller unit.
Motor signal processing module 320 is used for gathering and the processing motor signal, as magslip pumping signal EX1, EX2, and magslip feedback signal S1, S2, S3, S4, and motor temperature sensor signal NTC1, NTC2.
Current detection circuit 330 is used for gathering and the dc bus current signal IP for the treatment of of battery and motor triple line current signal IU, IV, IW.
Temperature sensing circuit 340 is used for importing into to central process unit the temperature signal of each IGBT module, and the temperature signal of each IGBT module can be obtained by temperature collection circuit.
DC bus-bar voltage testing circuit 350 is used for importing DC bus-bar voltage signal UDC into to central process unit, and this DC bus-bar voltage signal UDC can be obtained by DC bus-bar voltage collection circuit.
Power-switching circuit 360 is used for providing suitable power supply to other system.
Each signal of motor signal processing module, current detection circuit, temperature sensing circuit, the output of DC bus-bar voltage testing circuit is spread out of by communication module by central process unit; as spread out of to upper computer; the situation of learning circuit that can be real-time; make system have overvoltage, under-voltage, overcurrent, short circuit and overheat protector function, have better safety and integration.
In addition, the present invention also provides the motor control method of above-mentioned electronlmobil, comprising: obtain vehicle speed signal, and obtain throttle signal; When throttle signal is effective, if vehicle speed signal greater than the preset vehicle speed value, then drives first machine operation, otherwise, drive second machine operation.With reference to shown in Figure 3, control method for the embodiment of the electric machine control system of above-mentioned electronlmobil, Central Processing Unit (CPU) is after receiving vehicle speed signal and receiving throttle signal by the electrode signal processing module, judge according to the preset vehicle speed value, and send corresponding driving signal, when the vehicle speed signal value surpassed the preset vehicle speed value, Central Processing Unit (CPU) was to the first driver element output drive signal, thus the work of driving permagnetic synchronous motor; Otherwise Central Processing Unit (CPU) drives dc brushless motor work to the second driver element output drive signal, thereby realizes the time-sharing work of the motor of different capacity.
The above is preferred embodiment of the present invention only, and the present invention is not limited to this.
Though the present invention is described in conjunction with above embodiment, but the present invention is not defined to above-described embodiment, and only being subjected to the restriction of claims, those of ordinary skills can easily make amendment to it and change, but do not leave essence design of the present invention and scope.