Voltage-controlled variable-frequency motor simulation experiment system for automotive engine throttle

The invention discloses a voltage-controlled variable-frequency motor simulation experiment system for an automotive engine throttle. The simulation experiment system comprises an alternating-current (AC) power supply, a frequency converter, a motor, a crankshaft position sensor, a switching power supply and a digital frequency meter, wherein the AC power supply is used for supplying an AC to a whole simulation experiment system; an input terminal of the frequency converter is connected with an output terminal of the AC power supply, so as to form a three-phase AC through carrying out frequency conversion processing on the AC; the motor is electrically connected with an output terminal of the frequency converter, so as to put through the power supply and drive a motor revolution rate simulation gear to rotate; the crankshaft position sensor comprises a sensor magnetic head and a signal rotor, and the signal rotor is arranged on the motor revolution rate simulation gear, so as to test the revolution rate of the motor; the switching power supply is connected between the AC power supply and the digital frequency meter, and the digital frequency meter is further connected with a signal output terminal of the crankshaft position sensor. According to the simulation experiment system, the motor is controlled by the frequency converter, so that simulated engine revolution rate required by an experiment can be simulated in a high-precision manner, and the accuracy and operability of the experiment are improved.