There is a DC motor. When it is connected to a circuit with a voltage of 0.2V, the motor will not rotate, and the measured current flowing through the motor is 0.4A. If it is connected to 2V, the motor will not rotate There is a DC motor. When it is connected to a circuit with a voltage of 0.2V, the motor will not rotate, and the measured current flowing through the motor is 0.4A. If it is connected to a circuit with a voltage of 2V, the motor will work normally, and the working current is 1a (1) The output power of the motor in normal operation (2) If the rotor is suddenly stuck during normal operation, what is the heating power of the motor at this time? There is a DC motor. When it is connected to the circuit of 0.2V voltage, the motor does not rotate, and the measured current flowing through the motor is 0.4A. If it is connected to 2V voltage, the motor will not rotate There is a DC motor. When it is connected to a circuit with a voltage of 0.2V, the motor will not rotate, and the measured current flowing through the motor is 0.4A. If it is connected to a circuit with a voltage of 2V, the motor will work normally, and the working current is 1a (1) The output power of the motor in normal operation (2) If the rotor is suddenly stuck during normal operation, what is the heating power of the motor?

There is a DC motor. When it is connected to a circuit with a voltage of 0.2V, the motor will not rotate, and the measured current flowing through the motor is 0.4A. If it is connected to 2V, the motor will not rotate There is a DC motor. When it is connected to a circuit with a voltage of 0.2V, the motor will not rotate, and the measured current flowing through the motor is 0.4A. If it is connected to a circuit with a voltage of 2V, the motor will work normally, and the working current is 1a (1) The output power of the motor in normal operation (2) If the rotor is suddenly stuck during normal operation, what is the heating power of the motor at this time? There is a DC motor. When it is connected to the circuit of 0.2V voltage, the motor does not rotate, and the measured current flowing through the motor is 0.4A. If it is connected to 2V voltage, the motor will not rotate There is a DC motor. When it is connected to a circuit with a voltage of 0.2V, the motor will not rotate, and the measured current flowing through the motor is 0.4A. If it is connected to a circuit with a voltage of 2V, the motor will work normally, and the working current is 1a (1) The output power of the motor in normal operation (2) If the rotor is suddenly stuck during normal operation, what is the heating power of the motor?

The resistance of the motor R = 0.2 / 0.4 = 0.5 (Ω) (1) the output power of the motor in normal operation pout = u * I-I * I * r = 2 * 1-1 * 1 * 0.5 = 2-0.5 = 1.5 (W) (2) if the rotor is suddenly stuck in normal operation, the heating power of the motor PQ = u * U / r = 2 * 2 / 0.5 = 8 (W) answer: (1) the motor

There is a DC motor, when it is connected to the circuit of 0.2V voltage, the motor does not rotate, and the measured current flowing through the motor is 0.4A. If it is connected to the circuit of 2V voltage, the motor works normally, and the working current is 1a Big? (Note: the motor is a pure resistance appliance when the rotor does not rotate in the circuit)

(1) When the motor does not run, it is a pure resistance circuit. From I = ur, we can get the resistance of the motor coil: r = u1i1 = 0.2v0.4a = 0.5 Ω. When the motor works normally, it is a non pure resistance circuit. The total power consumed: ptotal = u2i2 = 2V × 1A = 2W, thermal power: pthermal = i22r = (1a) 2 × 0.5 Ω = 0.5W, the motor works normally

There is a DC motor, when it is connected to the circuit of 0.2V voltage, the motor does not rotate, and the measured current flowing through the motor is 0.4A. If it is connected to the circuit of 2V voltage, the motor works normally, and the working current is 1a Big? (Note: the motor is a pure resistance appliance when the rotor does not rotate in the circuit)

(1) When the motor does not run, it is a pure resistance circuit. From I = ur, we can get the resistance of the motor coil: r = u1i1 = 0.2v0.4a = 0.5 Ω. When the motor works normally, it is a non pure resistance circuit. The total power consumed: ptotal = u2i2 = 2V × 1A = 2W, thermal power: pthermal = i22r = (1a) 2 × 0.5 Ω = 0.5W, the motor works normally