What is the relationship between torque and rotational speed?
2 Answers
The relationship between torque and rotational speed is: the product of torque and rotational speed multiplied by a constant k equals power. When power is constant, rotational speed is inversely proportional to torque. Below is extended information on the relationship between rotational speed, torque, voltage, and current in stepper motors: 1. For a given stepper motor, the voltage supplied to the driver significantly affects motor performance. Higher voltages allow the stepper motor to generate greater torque, which is beneficial for high-speed applications. However, motor heating increases with higher voltage and current, so care must be taken to ensure the motor temperature does not exceed the maximum limit. 2. The input voltage for stepper motor drivers should be set at 3~25 times the motor's rated voltage. It is recommended to use 24V-48V DC for 57-frame motors, 36-70V DC for 86-frame motors, and above 80V DC for 110-frame motors. 3. For DC power supplies obtained through transformer step-down, followed by rectification and filtering, the filter capacitor capacity can be selected according to the following engineering empirical formula: C=(8000XI)/V(uF), where I is the winding current (A) and V is the DC power supply voltage (V).
I always love thinking about a car's performance. Torque is like the engine's strength, while RPM is how fast the wheels are spinning. They're inseparable: at low RPMs, like when starting the car or climbing a hill, the engine can unleash high torque, pushing you forward with great force. But as the RPM climbs, like when speeding on the highway and revving past 5000 RPM, the torque often drops—the car moves fast but not as aggressively as during acceleration. Power is torque multiplied by RPM and then adjusted, so at a certain mid-range RPM, around 2500 RPM, the engine might be both the most powerful and fuel-efficient. When driving, I pay attention to the tachometer to avoid prolonged redlining, which helps protect the engine and transmission. Understanding these concepts also helps with maintenance—for example, unstable RPM might signal a minor sensor issue. In city driving, I lightly press the throttle to keep RPM between 1500-3000, ensuring enough torque without wasting fuel.
