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Frequency conversion control circuit for power conversion circuit and power generation system of maglev train

A technology of frequency conversion circuit and conversion circuit, which is applied in the direction of controlling the generator through the change of the magnetic field, converting the irreversible AC power input into DC power output, output power conversion device, etc., which can solve the problem that the voltage signal of the generator winding is not easy to obtain, etc. , to achieve the effect of increasing output power, reducing wiring requirements, and improving power factor

Active Publication Date: 2022-03-04
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional active power factor correction circuit with a multiplier needs to detect the input voltage and input current of the linear generator power conversion circuit. In practical applications, the generator winding inductance is used as the boost inductor, and the voltage signal on the generator winding Not readily available, so conventional power factor correction control techniques with multipliers are difficult to adopt

Method used

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  • Frequency conversion control circuit for power conversion circuit and power generation system of maglev train
  • Frequency conversion control circuit for power conversion circuit and power generation system of maglev train
  • Frequency conversion control circuit for power conversion circuit and power generation system of maglev train

Examples

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Effect test

no. 1 example

[0031] see figure 2 , The frequency conversion control circuit 1 includes a single-cycle control circuit 20 and a frequency conversion circuit 10 .

[0032] Single cycle control circuit 20

[0033] The single-cycle control circuit 20 includes a PI regulator unit 21 , a switching integrator unit 22 , a comparator unit 23 , an RS flip-flop unit 24 and an inverter unit 25 connected in sequence.

[0034] The PI regulator unit 21 includes a PI regulation comparator 211 and a feedback circuit 212 , one input terminal of the PI regulation comparator 211 is connected to the output voltage Vout of the corresponding power conversion circuit 2 , and the other input terminal is connected to a reference voltage value Vref. The output end of the PI adjustment comparator 211 is connected to the input end of the PI adjustment comparator 211 through the feedback circuit 212, and the difference between the reference voltage value Vref and the output voltage Vout is used as the input of the PI...

no. 2 example

[0048] image 3 The second embodiment of the frequency conversion control circuit based on the single-cycle control technology in the first aspect of the present invention is shown, wherein the single-cycle control circuit 20 is a single-cycle control circuit in trailing edge regulation mode. The frequency conversion circuit 10 in the second embodiment can have the same form as the frequency conversion circuit 1 in the first embodiment, and its single-cycle control circuit 20 also includes a PI regulator unit 21 and a switch integrator unit connected in sequence 22. A comparator unit 23 and an RS flip-flop unit 24, where the same reference numerals denote the same components.

[0049] Unlike the first embodiment, the single-cycle control circuit 20 in the second embodiment does not include an inverter unit 25, but has a subtractor unit 26, which replaces the inverter unit of the first embodiment of the present invention 25. That is, the input current IL is input to one input...

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Abstract

The invention provides a frequency conversion control circuit for a power conversion circuit. The frequency conversion control circuit includes a single-cycle control circuit and a frequency conversion circuit. Turn on or off the driving signal of the switch unit in the power conversion circuit, so that the phase difference of the input current relative to the input voltage can be adjusted by adjusting the turn-on or turn-off time of the switch unit, so as to realize power factor adjustment; and the frequency conversion circuit will pass through The input current regulated by the single-cycle control circuit is converted and sent to the clock input terminal of the single-cycle control circuit, so that the clock input frequency of the single-cycle control circuit is proportional to the frequency of the input current, so as to realize frequency conversion control as the input current changes. The present invention also provides a power generation system for a maglev train using the frequency conversion control circuit.

Description

technical field [0001] The invention relates to the output power conversion of a linear generator, in particular to the frequency conversion control of a linear motor induction generator of a high-speed maglev train. Background technique [0002] The electric energy of the electrical equipment (such as suspension system, air conditioner or lighting device) on the constant conduction maglev train is provided by the linear generator combined in the train suspension magnet and the on-board storage battery. In order to ensure the normal operation of the train for a long time, the linear generator on the maglev train must charge the battery in time. Since the magnitude of the AC electromotive force induced on the coil of the linear generator is related to the running speed of the train, when the train is in a low-speed state, the electric energy generated by the original linear generator on the train cannot meet the sufficient power supply requirements of the on-board battery, so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/42H02M7/02H02J7/14H02P9/14
CPCH02M1/4208H02M7/02H02J7/14H02P9/14Y02B70/10Y02T10/92
Inventor 陈修林王三虎张顺彪王富光胡丹华谭红林罗慧曾理
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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