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Ship motor brake control system

A motor braking and control system technology, applied in the control system, vector control system, motor generator control, etc., can solve the problems of increasing production cost and occupying space of the braking resistor box, so as to save production cost and achieve good stability and dynamic performance, the effect of low noise

Active Publication Date: 2019-06-14
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the installation of the braking resistor box not only takes up space, but also increases production costs

Method used

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  • Ship motor brake control system
  • Ship motor brake control system
  • Ship motor brake control system

Examples

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no. 1 example

[0035] Such as figure 1 As shown, in the existing ship electric propulsion system, the generator winding 10 provides, for example, a 690V three-phase alternating current to the input end of the ship electric propulsion frequency converter 20, and the three-phase alternating current passes through the three-phase rectifying unit 21 in the frequency converter 20 Converted to a voltage of about 1050V, when braking, this voltage will be raised, and this voltage will be transmitted to the chopper resistance circuit 22, so the chopper resistance circuit 22 is also required to control the IGBT in it to perform chopper operation, or when the frequency conversion When the device fails, the IGBT in it is turned on for rapid discharge. The intermediate voltage is transmitted to the inverter main control unit 23 , and the inverter main control unit 23 further controls the opening and closing of the IGBTs of its three bridge arms to control the operation of the motor load 30 .

[0036] Fo...

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PUM

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Abstract

The invention discloses a ship motor brake control system. According to the system, a spatial voltage vector is determined by calculating amplitude increment and phase increment of a stator flux linkage, and then an inverter of the motor is controlled by modulating the intermediate voltage through the spatial voltage vector, so that deceleration or parking of a ship electric driving system is achieved. According to the ship motor brake control system in the invention, not only can the production cost be saved, but also the motor frequency converter can be ensured not to generate overvoltage faults during normal operation.

Description

technical field [0001] The invention belongs to the technical field of ship electric propulsion, and in particular relates to a ship motor braking control system without using chopper resistors. Background technique [0002] At present, in order to solve the shortcomings of traditional marine diesel propulsion systems such as poor maneuverability, large power loss and low operating efficiency, more and more ships are equipped with electric propulsion systems. The electric propulsion ship system uses a frequency converter to drive the motor to propel the propeller to rotate, or indirectly promotes the propeller to rotate through the gearbox. When a ship propelled by electricity is decelerating or stopping, the motor in the braking state will feed back energy to the frequency converter. Therefore, when the frequency converter has no energy feedback function, it is often necessary to install a braking resistor (chopper resistor) to consume energy to ensure that the intermediat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/36H02P21/28H02P27/12
Inventor 刘可安尚敬梅文庆胡仙刘勇甘韦韦付翔宇付如愿郑晖
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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