Electromagnetic dual-salient pole motor driving and charging integrated system of complex excitation winding

A technology of electric excitation double 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: 2018-05-01
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 req

Method used

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  • Electromagnetic dual-salient pole motor driving and charging integrated system of complex excitation winding
  • Electromagnetic dual-salient pole motor driving and charging integrated system of complex excitation winding
  • Electromagnetic dual-salient pole motor driving and charging integrated system of complex excitation winding

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0078] Example one:

[0079] Such as figure 1 The shown electric excitation double salient motor multiplexing excitation winding drive and charging integrated system, its on-board part mainly includes battery, charge and discharge DC / DC converter, three-phase bridge inverter, electric excitation double salient motor, Charge and discharge switch, EMI filter, charging socket, detection control circuit and controller (such as DSP28335, etc.). Among them, the electric excitation double salient motor adopts a 12 / 10 pole structure, and the arrangement of the armature winding and the two-section excitation winding is as follows figure 2 As shown, when the number of segments of the field winding of the electric excitation double salient motor is greater than two segments, it can be divided into two segments in the form of series or parallel, such as image 3 Shown is a schematic diagram of 4 segments of field windings connected in series into two segments, such as Figure 4 Shown is a sc...

Example Embodiment

[0081] Example two:

[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, 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 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 , The switch tube S 1 And S 2 In the PWM state, calculate the switching tube S according to the following relationship 1 , S 2 Duty cycle D 1 , Ideally the switch 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 P Are the resistance of t...

Example Embodiment

[0091] Example three:

[0092] This example implements the control strategy of the electric vehicle in the braking state on the basis of the first embodiment.

[0093] 1) Toggle switch K 1 Closed, switch tube S 7 Open, switch tube S 1 , S 2 , S 4 , S 6 Turn off

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

[0095] 3) At the same time, the position signal of the electric excitation double salient motor is collected, and the inverter swit...

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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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IPC IPC(8): H02P23/28H02P25/092H02P27/08B60L11/18
CPCH02P23/28H02P25/092H02P27/085B60L53/24Y02T10/64Y02T10/72Y02T10/70Y02T10/7072Y02T90/14
Inventor 魏佳丹张陶晶陶文杰柳鹏周波
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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