E-47A PM Current Control Loop fault in Toshiba drive
E-47 PM Current Control Loop Error fault in Toshiba drive
Description This is a runtime stability fault. In PM Vector control, the drive manages the "Id" (Flux) and "Iq" (Torque) current loops at high speed (e.g., 4000 times a second). E-47 means the current loop has become unstable—the drive is commanding voltage but the current is oscillating wildly or spiking. Causes
1. Carrier Frequency: The PWM frequency is set too low for the PM motor's low inductance. (PM motors often require 4kHz-8kHz minimum).
2. Gain Settings: The Current Loop PI gains are too high.
3. Saturation: The motor core is saturating due to overload. Solution Increase the Carrier Frequency (F300). Low inductance motors need faster switching to smooth out the current ripple.
If the motor makes a screaming noise before tripping E-47, the current gains are too high. Lower the "Current Control Proportional Gain" (F400 series).
Check for loose motor connections which can cause arcing and current loop instability.
Description This is a runtime stability fault. In PM Vector control, the drive manages the "Id" (Flux) and "Iq" (Torque) current loops at high speed (e.g., 4000 times a second). E-47 means the current loop has become unstable—the drive is commanding voltage but the current is oscillating wildly or spiking. Causes
1. Carrier Frequency: The PWM frequency is set too low for the PM motor's low inductance. (PM motors often require 4kHz-8kHz minimum).
2. Gain Settings: The Current Loop PI gains are too high.
3. Saturation: The motor core is saturating due to overload. Solution Increase the Carrier Frequency (F300). Low inductance motors need faster switching to smooth out the current ripple.
If the motor makes a screaming noise before tripping E-47, the current gains are too high. Lower the "Current Control Proportional Gain" (F400 series).
Check for loose motor connections which can cause arcing and current loop instability.
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