33results about How to "Output response is fast" patented technology

The invention discloses a high-precision battery model, which includes a micro control unit MCU, a power supply unit, a temperature simulation unit, a battery simulation unit, and an RS485 communication unit; The unit uses high-precision ADC and DAC for output sampling and control, which can simulate faults such as short circuit, open circuit, and reverse connection; the temperature simulation unit outputs analog temperature voltage through the micro control unit MCU to simulate the real battery temperature; the RS485 communication unit connects The 485 communication interface on the micro control unit MCU realizes the control of the battery simulation unit. Compared with the battery simulators on the market, the high-precision battery model of the present invention has higher output precision and faster response speed, and adopts isolated output to simulate battery modules in multi-stage series.

The invention discloses a multi-DC motor parallel fault-tolerant system and a fault-tolerant control method. The speed obtained by the position sensor under the action of the rotational speed calculation unit is fed back to the speed adjustment module, and the current of the motor obtained by the current detection sensor is under the action of the motor fault detection signal. The current value obtained by the current calculation unit is fed back to the current regulation module; the reference speed and the feedback speed signal are obtained under the action of the speed comparator to obtain the speed error and the current is obtained through the PI controller; then the reference current is obtained under the action of the motor fault detection signal; The current value of the motor current signal is obtained under the action of the motor fault detection signal; the current error is obtained by the reference current and current under the action of the current comparator, and the duty ratio is obtained through the hysteresis control comparator; and then controlled by the PWM pulse generation unit The on-off pulse control signal of the switching tube in the (n+1) phase inverter. The invention ensures efficient and stable operation of the motor and improves industrial production efficiency.

The invention relates to an MRI (Magnetic Resonance Imaging) B0 cancellation amplifier based on a PID (Proportion Integration Differentiation) regulation technology and a PWM (Pulse-Width Modulation) technology. The MRI B0 compensation amplifier comprises a positive-negative power supply module and a compensation amplifying circuit board, and technical measures such as amplified filtration, negative feedback, PID frequency response regulation, positive feedback, PWM, PWM waveform shaping based on an FPGA (Field Programmable Gate Array), an isolation driving technology, signal multiplication, signal filtration and reduction, electric current sampling, electric current monitoring and over-current protection are adopted. The MRI B0 compensation amplifier has the following advantages that: feedback gain demands are proper, so that the system operation is more stable; by virtue of PID regulation, the load matching range of the compensation amplifier is wider; the defects that small matching range and self excitation occurring in an unmatched load range of a common amplifier are solved; the response output speed can be quickened to a certain extent, so that over-slow response speed caused by over-high load sensibility can be avoided; a PMW switching mode is adopted, the efficiency of the compensation amplifier can be up to 90%, and the defect of low efficiency of the common amplifier is solved.