The starting method affects the life of the engine and the network. Let's look at the difference between direct starting and starting through a frequency converter.
Direct starting
The engine is connected directly to the network at full voltage.
- Pros: simplicity and low cost.
- Minus: high starting current (5-7 times), shocks to the mechanism, network sagging.
Starting through frequency driver
The frequency driver smoothly accelerates the motor by controlling the frequency.
- Plus: soft start, low starting current, speed control, energy saving.
- Minus: more expensive, load on insulation.
Comparison
| Parameter | Direct start | Frequency driver |
|---|---|---|
| Starting current | High | Low |
| Shocks on the mechanism | Yes | No |
| Regulation speed | No | Yes |
| Price | Low | Higher |
What to choose
For low-power engines and rare starts, direct starting is suitable. For powerful machines, frequent starts, weak networks and where speed control is needed - frequency driver or a soft starter. Direct starting with frequent hard starts accelerates wear and leads to rewinding.
Do you need help choosing a method for starting engines in Tashkent? Elektromotors engineers will advise - contact us.