How do inverter drives work

The resistor is usually external and is sized to pass enough current to match the Current rating of the brake switch, not so high as to be ineffective and of physical size Watts such that it is not overheated. Note: Generally motors accept switching frequencies up to 5kHz before needing special insulation or de-rating for use with Inverters.

We've sent you a message containing a confirmation link. Click the link to complete the process. Login Register My Account. This means the AC power is run to the speed or the torque of the demands needed. This is why you can save large amounts of money using our AC drives. You must be logged in to post a comment. ABB Inverter Family. Loading Comments Figure 5: Diagram of a squirrel cage rotor.

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Information is outdated or wrong. I can't find what I'm looking for. Other issue not in this list. AC Drives can protect motors from damage by accurately controlling the torque. For example, in a machine jam, the motor will continue to rotate until the overload device opens. An AC drive can be set to limit the amount of torque applied to the motor to avoid exceeding the torque limit.

An AC drive can deliver low or high-speed required by the load without speed-increasing or reduction devices and gearboxes. This saves maintenance costs and floor-space requirements. In procuring AC drives, there are several factors to consider. They are commonly used in conveyor belts, compressors, and pumps. Since LV drives cause less stress to the motor, minimal maintenance is required.

It also consumes less energy. An LV drive produces high frequency and better motor performance at low voltage, thus reducing production cost.

On the downside, low voltage creates more current. If LV drives are used with high horsepower HP machines, it generates more heat and increases the room temperature. More current means more generated heat. Installing vents and additional air-conditioning is necessary.

Huge and multi-megawatt electric motors in power stations and metal processing plants use MV drives. They require a high input voltage to achieve a high output voltage.