Multi-shaft servo amplifier for hydraulic mechanical arm

The utility model discloses a multi-shaft servo amplifier for a hydraulic mechanical arm. The multi-shaft servo amplifier comprises an analog input circuit, a controller interface circuit, a plurality of hydraulic servo drive circuits, a power supply, a servo valve interface circuit and a plurality of servo valves, wherein the power supply supplies power for the controller interface circuit, the plurality of hydraulic servo drive circuits and the servo valve interface circuit, and the analog input circuit, the controller interface circuit, the hydraulic servo drive circuits, the servo valve interface circuit and the servo valves are connected sequentially. The hydraulic multi-shaft servo amplifier can send and receive control signals, performs multi-shaft hydraulic servo control and controls the rotation direction and the speed of each joint of the hydraulic mechanical arm of high-voltage hot-line work robot; the amplifying circuit has higher linearity, convenient zero and gain adjustment manner, high respons