How do I calculate motor torque from current?

Step 1: P = √3 × V × I × cos φ × η (shaft power in W). Step 2: T = P × 9549 / n (in N·m), where n is speed in RPM. The constant 9549 converts kW and RPM to N·m.

What is the 9549 constant?

T = P × 9549 / n comes from T = P / ω, where ω = 2πn/60. So T = P × 60/(2π×n) = P × 9549/n when P is in kW and T in N·m. For P in watts: T = P × 9.549/n.

What is rated torque vs starting torque?

Rated torque is the continuous torque at full load and rated speed. Starting torque is the torque at zero speed (locked rotor). For standard induction motors, starting torque is typically 150-300% of rated torque.

How does speed affect torque?

For constant power: T = P/ω, so torque is inversely proportional to speed. Below base speed with VFD (constant V/f): torque stays roughly constant. Above base speed (field weakening): torque drops as 1/n.

What is the difference between shaft torque and air-gap torque?

Air-gap torque is the electromagnetic torque produced in the motor. Shaft torque is lower due to friction and windage losses. For practical purposes, T_shaft = P_output × 9549 / n.

मुक्त अभियांत्रिकी साधन

प्रवाहावरून मोटर टॉर्क कॅल्क्युलेटर

साखळी गणना: प्रवाह → शक्ती → टॉर्क. T = P × 9549 / n (N·m). प्रवाह किंवा शक्ती, व्होल्टेज, वेग प्रविष्ट करा.

T = 9549 × P/nI → P → TN·m / lb·ft

Results

शाफ्ट टॉर्क

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शाफ्ट शक्ती (यांत्रिक)

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विद्युत इनपुट शक्ती

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कोनीय वेग ω

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प्रवाह → शक्ती → टॉर्क साखळी

Categories:

Vibromera

व्यावसायिक पोर्टेबल रोटर बॅलन्सर्स आणि कंपन विश्लेषकांचे उत्पादक. जगभर डिलिव्हरी आणि अभियंता सहाय्य.

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