Electric excitation doubly salient motor drive and charging integrated system with multiplexed excitation windings

A technology of electric excitation doubly salient poles and excitation windings, which is applied in electric vehicle charging technology, motors, charging stations, etc., and can solve the problems of high cost and large land occupation

Active Publication Date: 2020-07-07
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] High-power charging is usually carried out with independent chargers. The independent charging system requires ground charging devices, mainly including special or general chargers, and their charging stations. These charging stations have relatively higher requirements for charging technology and charging safety, and As the driving volume of electric vehicles increases significantly, charging in this way requires the construction of a large number of charging stations, which occupy a large area of ​​land and are expensive

Method used

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  • Electric excitation doubly salient motor drive and charging integrated system with multiplexed excitation windings
  • Electric excitation doubly salient motor drive and charging integrated system with multiplexed excitation windings
  • Electric excitation doubly salient motor drive and charging integrated system with multiplexed excitation windings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Such as figure 1 The driving and charging integrated system of the multiplexed excitation winding of the electrically excited double-salient pole motor shown in the figure, its vehicle-mounted part mainly includes a battery, a charge-discharge DC / DC converter, a three-phase bridge inverter, an electrically excited double-salient pole motor, Charge and discharge switch, EMI filter, charging socket, detection control circuit and controller (such as DSP28335, etc.), etc. Among them, the electric excitation double salient pole motor adopts a 12 / 10 pole structure, and the arrangement of its armature winding and two sections of excitation winding is as follows figure 2 As shown, when the number of excitation winding sections of the electrically excited doubly salient pole motor is greater than two sections, it can be divided into two sections in series or in parallel, as shown in image 3 Shown is a schematic diagram of four sections of excitation winding connected in serie...

Embodiment 2

[0082] In this example, on the basis of the first embodiment, the control strategy of the electric vehicle in the driving state is implemented.

[0083] 1) Toggle switch K 1 closed, the switch tube S 3 , S 5 , S 7 turn off;

[0084] 2) The battery voltage U is sampled by the voltage sensor bat , the excitation winding F is sampled by the current sensor 1 and field winding F 2 The excitation current I F1 and I F2 , I F1 and I F2 Ideally should be equal, let I F1 and I F2 equal to I F , switch tube S 1 and S 2 In the PWM state, the switch tube S is calculated according to the following relationship 1 , S 2 The duty cycle D 1 , ideally the switching tube S 1 and switch tube S 2 The duty cycle is equal, and the field winding F is controlled by this duty cycle 1 and field winding F 2 , so that the excitation current during steady-state operation is:

[0085]

[0086] T e is the given output torque of the motor, ω is the given speed of the motor, R F and R...

Embodiment 3

[0092]In this example, on the basis of the first embodiment, the control strategy of the electric vehicle in the braking state is implemented.

[0093] 1) Toggle switch K 1 closed, the switch tube S 7 turn on, the switch tube S 1 , S 2 , S 4 , S 6 turn off;

[0094] 2) The charging current of the battery and the current of the excitation winding obtained by the sampling of the current sensor, the switching tube S 3 , S 5 In the PWM state, control the battery charging current and the amplitude of the excitation winding current, that is, when the excitation winding current is too large, reduce the S 3 , S 5 duty cycle, when the excitation winding current is small, increase S 3 , S 5 duty cycle, and the battery charging current is the sum of the currents of the two excitation windings. At this time, the excitation winding current of the electrically excited double salient pole motor is in the reverse excitation state;

[0095] 3) At the same time, the position signal o...

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Abstract

The invention discloses an electromagnetic dual-salient pole motor driving and charging integrated system of a complex excitation winding. The system comprises a storage battery, a charge-discharge converter, an electromagnetic dual-salient pole motor, an inverter, an EMIS filter and a charge-discharge changeover switch, wherein the charge-discharge converter comprises seven IGBTs, two diodes anda segmented excitation winding of the electromagnetic dual-salient pole motor. By segmented excitation winding connection mode and control mode, the electromagnetic dual-salient pole motor can be applied to an electric vehicle driving and charging integrated system, an excitation control loop of the electromagnetic dual-salient pole motor and an inductance phase in the storage battery charge-discharge converter are integrated, and the total loss of the system is reduced; the excitation winding is connected in parallel and conducted during running driving, the current stress of each device is small, the running of the motor within a wide rotational-speed range can be achieved by adjusting the excitation current, electromagnetic braking is achieved during braking, and energy is fed back to the battery; and the function of large-power and rapid charging can be achieved during charging running, and the current ripple is small.

Description

technical field [0001] The invention relates to an electric excitation double-salient pole motor driving and charging integration system for multiplex excitation windings of electric vehicles, which belongs to the field of motor systems and controls. Background technique [0002] At present, the motors on electric vehicles mainly use induction motors, permanent magnet synchronous motors and switched reluctance motors. These types of motors have their own advantages and disadvantages. Among them, the induction motor has a solid structure, and the vector control technology is very mature now, and its speed regulation performance is superior. , suitable for high-speed, high-power electric vehicles, its disadvantage is low efficiency in the small load range; permanent magnet synchronous motor has high efficiency and power density, but there is a problem of magnetic steel performance degradation caused by high-speed weak magnetic field, and the design of the motor is difficult Re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P23/28H02P25/092H02P27/08B60L53/24
CPCB60L53/24H02P23/28H02P25/092H02P27/085Y02T10/64Y02T10/70Y02T10/7072Y02T10/72Y02T90/14
Inventor 魏佳丹张陶晶陶文杰柳鹏周波
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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