Marine large-power brushless direct current motor commutation process control device and control method

A brushed DC motor and process control technology, applied in the direction of electronic commutator, torque ripple control, etc., can solve the problems of little research on commutation process control technology of marine high-power brushless DC motor, and the technology has not yet been reported. , to achieve the effect of low hardware cost and simple software implementation

Inactive Publication Date: 2016-03-09
JIANGSU UNIV OF SCI & TECH
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Problems solved by technology

[0003] So far, there is little research on the commutation process control technology of marine h...

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  • Marine large-power brushless direct current motor commutation process control device and control method

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[0013] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0014] Such as figure 1 As shown, it is a structural block diagram of a marine high-power brushless DC motor commutation process control device of the present invention, which is used to control the commutation process of the permanent magnet brushless DC motor 4. The control device includes a DC voltage source 1, A three-phase full-bridge inverter 2 and six power transistors 31-36. Among them, the three-phase full-bridge inverter 2 is composed of six power tubes 21-26 connected in series and then connected in parallel. Specifically, the source of the power tube 21 is connected to the drain of...

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Abstract

The invention discloses a marine large-power brushless direct current motor commutation process control device. The device includes a direct voltage source, a three-phase full-bridge inverter and six electric power transistors, wherein the three-phase full-bridge inverter is formed by connecting six power tubes in series two by two and then connecting the power tube in parallel, and the six power tubes are connected with the six electric power transistors in parallel in one-to-one correspondence; and the three-phase full-bridge inverter is connected with a permanent magnet brushless direct current motor. The invention also discloses a large-power brushless direct current motor commutation process control method, at the starting moment of a commutation process, the electric power transistor connected in parallel with a power tube that is switched off in the three-phase full-bridge inverter is switched on, and the other five electric power transistors are switched off; and at the finishing moment of the commutation process, all the six electric power transistors are switched off. The marine large-power brushless direct current motor commutation process control device and control method are relatively low in hardware cost, an original operation control mode of a brushless direct current motor does not need to be changed, and software implementation is simple.

Description

technical field [0001] The invention belongs to the technical field of ship electric propulsion, and in particular relates to a process control device and control method for the phase commutation process of a high-power brushless DC motor for a ship. Background technique [0002] In recent years, due to its simple structure, high power density, simple control and many other advantages, brushless DC motors have been increasingly widely used in the field of ship electric propulsion. In the commutation process unique to the 120° conduction of the brushless DC motor, due to the inductance effect of the motor winding, the phase current of the brushless DC motor is turned off through the power tube of the same bridge arm as the three-phase full-bridge inverter. The freewheeling flow of the body diode will lead to a higher freewheeling impulse voltage. Especially for marine electric propulsion systems, brushless DC motors operate under high-voltage and high-current conditions. bo...

Claims

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Application Information

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IPC IPC(8): H02P6/10H02P6/15
CPCH02P6/10
Inventor 张懿缪维娜
Owner JIANGSU UNIV OF SCI & TECH
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