Rail vehicle high-voltage electric transformer and transformer circuit module power supply method

Abstract

The invention relates to a rail vehicle high-voltage transformer and a transformer circuit module power supply method. The rail vehicle high-voltage transformer comprises a power supply module, an acquisition and processing circuit module and a signal output module. The power supply module comprises a first high-voltage arm resistor, a first low-voltage arm resistor, a light emitting plate and a photovoltaic cell panel, wherein one end of the first high-voltage arm resistor is connected with a high-voltage wire, the other end of the first high-voltage arm resistor is connected with the first low-voltage arm resistor, the other end of the first low-voltage arm resistor is grounded, the light emitting plate is connected with a command end of the first high-voltage arm resistor and the first low-voltage arm resistor, the photovoltaic cell panel is arranged beside the light emitting plate, and the photovoltaic cell panel is connected with the acquisition and processing circuit module. The rail vehicle high-voltage transformer is small in size, circuit modules inside the transformer can be powered with the use of the existing high voltage through the high-voltage arm resistor, the low-voltage arm resistor, the light emitting plate and the photovoltaic cell panel, no additional power supply needs to be connected, and false output due to the influence of quality problems of a power supply on the transformer is avoided.

Description

technical field [0001] The invention relates to a transformer, in particular to a rail vehicle high-voltage electric transformer and a power supply method for a circuit module of the transformer. Background technique [0002] At present, the power supply voltage of domestic rail vehicles running on main-line railways reaches 27.5KV, so more stringent design and performance requirements are put forward for the voltage detection of the high-voltage system of vehicles. [0003] In the high-voltage detection of existing high-speed rail vehicles, traditional electromagnetic high-voltage transformers and traditional electronic high-voltage transformers are used. Among them, the traditional electromagnetic high-voltage transformer has complex insulation structure, inherent defects such as magnetic saturation and ferromagnetic resonance, small dynamic range, large volume and weight, and this kind of transformer can only measure AC voltage but not DC voltage. Traditional electronic ...

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Problems solved by technology

Among them, the traditional electromagnetic high-voltage transformer has a complex insulation structure, has inherent defects such as magnetic saturation and ferromagnetic resonance, small dynamic range, large volume and weight, and this kind of transformer can only measure AC voltage but not DC voltage.

Traditional electronic high-voltage transformers need an external power supply to supply power for their internal signal processing circuits, and the external output signals are output using low-voltage and low-current signal cables. Interference signals generated by the harsh electromagnetic environment on the roof will interfere with power cables, The signal cable is even transmitted to the signal processing circuit board through the cable. In addition, the quality of the power supply will sometimes be degraded due to the influence of other loads on the train. Therefore, this kind of transformer is prone to error output and has poor anti-electromagnetic interference performance.

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