Question

Найти величину тока в обмотке троллейбусного двигате-ля, развивающего силу тяги 6000 Н при напряжении в се-ти 600 В и движущегося со скоростью 54 км/ч. К.п.д. дви-гателя 80 %.

Answer 1

кпд=F*V/I*U   I=F*V/U*кпд=6000*15/600/0,8=31,5 A

Answer 2

#### Calculation of Current in the Trolleybus Motor To find the current in the winding of the trolleybus motor, we can use the formula: **Current (I) = Power (P) / Voltage (V)** The power developed by the motor can be calculated using the formula: **Power (P) = Force (F) x Velocity (V)** Given: - Force (F) = 6000 N - Voltage (V) = 600 V - Velocity (V) = 54 km/h First, let's convert the velocity from km/h to m/s: - 54 km/h = 54,000 m/3600 s = 15 m/s Now, we can calculate the power developed by the motor: - Power (P) = 6000 N x 15 m/s = 90,000 W Next, we can calculate the current in the winding of the trolleybus motor: - Current (I) = Power (P) / Voltage (V) = 90,000 W / 600 V = 150 A Therefore, the current in the winding of the trolleybus motor is **150 A**. #### Efficiency of the Motor The efficiency of the motor can be calculated using the formula: **Efficiency (%) = (Output Power / Input Power) x 100** Given: - Efficiency (%) = 80% To calculate the input power, we can use the formula: **Input Power = Output Power / (Efficiency / 100)** Substituting the given values: - Input Power = 90,000 W / (80 / 100) = 112,500 W Therefore, the input power of the motor is **112,500 W**. The output power is the same as the power developed by the motor, which is 90,000 W. Now, we can calculate the efficiency of the motor: - Efficiency (%) = (Output Power / Input Power) x 100 = (90,000 W / 112,500 W) x 100 ≈ 80% Therefore, the efficiency of the trolleybus motor is **80%**. Please note that the search results provided by You.com did not contain relevant information for this specific calculation. The calculation was performed based on the given parameters and the general formulas for power, current, and efficiency.