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Carrier Frequency is an important parameter in inverters, especially in motor control systems. This is the frequency at which the voltage pulses are turned on and off to modulate the output AC voltage wave of the inverter, to control the speed and torque of the motor. The carrier frequency is typically much higher than the frequency of the output wave, normally ranging from a few kilohertz (kHz) to hundreds of kilohertz.
Principle of operation
Most inverters today use Pulse Width Modulation (PWM) technology to create a variable AC voltage from a DC voltage source. In PWM technology, the carrier frequency is the frequency at which the PWM pulses are switc
SC Error (Short Circuit) - The SC error refers to a short circuit at the output or a faulty IGBT. This is a common inverter error caused by an internal short circuit within the inverter or motor. This error can significantly affect the system's operation and pose a risk of equipment damage. Causes of SC Error: ● Faulty inverter ● Damaged motor due to overheating or weak insulation ● Short-circuited or grounded connection cable from the inverter output to the motor ● Hardware failure Solutions for Inverter SC Error: ● Check for short circuits at the inverter output using a multimeter (set to resistance measurement mode (Ω)). Measure between th
. This can lead to a number of problems such as: ● The engine operates unstable or vibrates. ● The inverter cannot control the motor accurately. ● The inverter automatically shuts off for protection. Cause of Cof error: ● The inverter adjusts the current Offset when detecting speed ● Hardware error Troubleshooting Steps: ● Set the value within the allowable range while the inverter automatically adjusts the current. ● Setting