Question

РЕШИТЕ ПОЖАЛУЙСТА!!троллейбус массой 11 тонн движется равномерно со скоростью 36 км/ч. найти силу тока в обмотке двигателя, если напряжение равно 550 В и КПД=80%.коэффициент сопротивления движения=0,02

Answer 1

КПД=Р(полезное)/Р(затрач) ,где КПД=0,80,Р(полезн)=F(тяги)*V(скорость),Р(затрачен)=U*I.Так как движение равномерное по горизонтальной дороге (по умалчанию), Fтяги=Fтрения=коэфициент *m*g.В итоге получаем I=коэфициент *m*g*V/(КПД*U).Не забудте перевести в систему Си

Answer 2

Calculation of Current in the Motor Winding

To find the current in the motor winding of the trolleybus, we can use the formula:

Power (P) = Voltage (V) × Current (I)

Given: - Mass of the trolleybus = 11 tons = 11,000 kg - Velocity of the trolleybus = 36 km/h - Voltage = 550 V - Efficiency (η) = 80% - Coefficient of rolling resistance (k) = 0.02

To calculate the power, we need to find the force acting on the trolleybus. The force can be calculated using Newton's second law of motion:

Force (F) = Mass (m) × Acceleration (a)

Since the trolleybus is moving at a constant velocity, the acceleration is zero. Therefore, the force acting on the trolleybus is also zero.

The power can be calculated using the formula:

Power (P) = Force (F) × Velocity (v)

Since the force is zero, the power is also zero. Therefore, the current in the motor winding can be considered as zero.

Please note that the given information does not provide any relevant data to calculate the current in the motor winding.