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DC Motor Torque Equation:
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The DC Motor Torque Equation describes the relationship between torque, current, and magnetic flux in a DC motor. It is fundamental for understanding motor performance and selecting appropriate motors for specific applications.
The calculator uses the DC motor torque equation:
Where:
Explanation: The equation shows that torque is directly proportional to both the armature current and the magnetic flux, with the motor constant K representing the specific characteristics of the motor design.
Details: Accurate torque calculation is essential for motor selection, performance analysis, and ensuring the motor can handle the required mechanical load without overheating or stalling.
Tips: Enter current in amperes (A), magnetic flux in webers (Wb), and the motor constant. All values must be positive numbers greater than zero.
Q1: What is the motor constant K?
A: The motor constant (K) is a characteristic value that depends on the motor's construction, including the number of poles, number of conductors, and winding configuration.
Q2: How does magnetic flux affect torque?
A: Increasing magnetic flux increases torque proportionally, which is why field weakening is used to control motor speed at constant power.
Q3: What are typical torque values for DC motors?
A: Torque values vary widely from small hobby motors (0.01-0.1 N·m) to industrial motors (10-1000+ N·m) depending on size and application.
Q4: Does this equation apply to all DC motors?
A: This basic equation applies to most DC motors, but modifications may be needed for specialized motors like brushless DC or universal motors.
Q5: How is torque related to motor power?
A: Power (P) = Torque (T) × Angular velocity (ω), so torque and speed together determine the motor's power output.