Voltage control method and apparatus, system, and maglev train

A voltage control system, comprising a transformer and a controller, wherein

• the transformer is configured to transform power supply current under control of the controller to obtain power current, a voltage of the power supply current is an input voltage, a voltage of the power current is an output voltage, and the power current is configured to drive a power system to provide a traction force for a maglev train;
• and
• the controller is configured to:
• acquire a train traveling speed, and determine a target transformation ratio corresponding to the train traveling speed based on correspondences between train traveling speeds and transformation ratios, wherein the transformation ratio is a ratio of an input voltage to an output voltage and is used to control a transformer to transform the input voltage, and the correspondences between train traveling speeds and transformation ratios are obtained based on correspondences between train traveling speeds and train traction forces at different transformation ratios.

A maglev train, comprising a power system and a voltage control system, wherein

• the voltage control system comprises a transformer and a controller;
• the transformer is configured to transform power supply current under control of the controller to obtain power current, a voltage of the power supply current is an input voltage, a voltage of the power current is an output voltage, and the power current is configured to drive a power system to provide a traction force for a maglev train;
• and
• the controller is configured to:
• acquire a train traveling speed, and determine a target transformation ratio corresponding to the train traveling speed based on correspondences between train traveling speeds and transformation ratios, wherein the transformation ratio is a ratio of an input voltage to an output voltage and is used to control a transformer to transform the input voltage, and the correspondences between train traveling speeds and transformation ratios are obtained based on correspondences between train traveling speeds and train traction forces at different transformation ratios.