Advantages And Disadvantages Of Variable Frequency Starting
Advantages
- Small Starting Current
The inverter can gradually increase the output frequency and voltage, so that the motor starts slowly from the low speed, so the motor starting current is small and the starting is smooth.
- Energy Saving And Environmental Protection
Compared with the traditional direct starting method, frequency conversion can save a lot of energy and reduce environmental pollution.
- Low Maintenance Cost
Due to the small starting current of the motor when starting current of the motor when starting, the damage to the motor and transmission mechanism is reduced, which extends the service life of the equipment, and runs stably, reducing the maintenance cost of the equipment.
- Adjust Speed
The inverter supports the adjustment of the motor speed, and can adjust the rated output power and speed according to different working conditions and needs to meet different working requirements.
- Application Example
Frequency conversion start-up technology in accurate control of concrete pump mixing system.
Shortcoming
- High Cost
Because additional frequency converter equipment is required, it needs to occupy a certain space, increasing the cost of equipment.
- Application Limitations
It is not cost-effective to use small equipment with low economic efficiency, and even some waste energy.
- Interference Problem
The frequency converter will produce certain noise and eletromagnetic wave interference, which may affect the normal operation of other equipment.
- Maintenance Difficulties
Due to the complexity of the circuit, equipment maintenance requires professional personnel to maintain and manage, and maintenance is difficult.
Advantages And Disadvantages Of Soft Boot
Advantage
- Smooth Start
The soft starter realizes the smooth start of the motor by gradually increasing the control voltage, avoiding the impact on the power grid and the motor, and reducing the failure rate of the equipment.
- Soft Parking
The soft starter also has a soft parking function, which can avoid torque shock and mechanical vibration caused by free parking, and further protect the equipment.
- Protection Function
The soft starter usually has overload, overheating, short circuit and other protection functions to ensure the safe operation of the equipment.
- Prolong The Life Of The Equipment
The smooth start and stop process reduces the overload condition of the motor and the wear in long-term use, and extends the service life of the motor.
- Application Example
Application of soft start technology in hydraulic system of concrete pump. (Visit ltconcretepump.com for more details.)
Shortcoming
- High Cost
The soft starter is more expensive than the traditional buck starter, which increases the cost of equipment investment.
- High Environmental Requirements
Soft starters need to use electronic components, and have high requirements for the use of the environment, such as temperature and humidity.
- Difficult Maintenance
The internal structure of the soft starter is more complex, and it is more difficult to maintain.
- Limited Scope Of Application
Although soft starters are suitable for motors that require a smooth start, for some special types of loads or motors with high starting requirements, soft starters may not meet the needs.
In summary, frequency conversion starting and soft starting have advantages and disadvantages, the choice of which starting method needs to be comprehensively considered according to the actual situation, such as equipment requirements, investment costs, use environment and other factors.
