FAQ
FAQAbout Products
- FAQ > Drive Products > Inverters-FREQROL > Energy consumption
FAQ
- Inquiries
Energy consumption
Household air-conditioners are often advertised by emphasizing that it saves energy by using an inverter. If a three-phase motor is driven by an industrial inverter, does it also save energy?
If it does, how much energy does it save?
If it does, how much energy does it save?
- Category :
Answer
Using a general-purpose inverter to drive a three-phase induction motor can save energy under the following two types of loads (application):
1. Constant-torque load (load of which torque is constant even when speed changes)
This load type is represented by a conveyor and cart and reducing the speed saves energy.
2. Square variable-torque load (load of which torque is in proportion to the square of speed)
This type of load is represented by a fan, pump, and blower. Since the shaft power is in proportion to the cube of speed, reducing the speed drastically saves energy. For example, reducing the speed to 1/2 reduces energy consumption to 1/8.
The energy saving effect depends on the load and speed.
1. Constant-torque load (load of which torque is constant even when speed changes)
This load type is represented by a conveyor and cart and reducing the speed saves energy.
2. Square variable-torque load (load of which torque is in proportion to the square of speed)
This type of load is represented by a fan, pump, and blower. Since the shaft power is in proportion to the cube of speed, reducing the speed drastically saves energy. For example, reducing the speed to 1/2 reduces energy consumption to 1/8.
The energy saving effect depends on the load and speed.
- Product Name
- Inverter, magnet motor drive
- Series
- Others
