Q1: What type of motor does SonnePower use for its motor and electric drive system?
A: It's a Permanent Magnet Synchronous Motor (PMSM)!
SonnePower's motor and electric drive system is designed to tightly integrate the motor with the electric drive system, forming a single, highly coupled unit. This design significantly reduces the overall system's space requirements, simplifies installation and maintenance processes, improves system efficiency, enhances system stability, optimizes performance matching, and thereby reduces overall costs.
Q2: Does SonnePower's motor and electric drive system require precharging?
A: Yes, it does!
SonnePower's motor and electric drive system does not come with an internal precharging mechanism, so an additional precharging box needs to be made. Motors generate a large inrush current when starting up, and precharging is mainly used to charge the internal components of the motor before startup, thereby mitigating the inrush current and reducing stress on the equipment.
Q3: How should the power-up and power-down process be carried out for SonnePower's motor and electric drive system?
A: The power-up sequence is to first apply low-voltage power and then high-voltage power; the power-down sequence is to first disconnect high-voltage power and then disconnect low-voltage power after the high-voltage has been fully discharged!
Correct power-up and power-down sequences are crucial. When the motor control system is first powered up, if high-voltage power is applied directly, it may generate a significant inrush current. This is because during system initialization, the control circuit is not yet fully prepared, and direct access to high voltage may lead to overload or damage. Applying low-voltage power first allows the control system to initialize, ensuring that all protection and control logic are functioning properly, before gradually introducing high-voltage power.
During power-down, disconnecting high-voltage power first ensures that the charge in the high-voltage capacitors is fully discharged. If high-voltage power is not disconnected first, directly disconnecting low-voltage power may cause the control system to fail to respond in time to the residual charge in the high-voltage capacitors, posing a safety hazard.
Additionally, after high-voltage power is disconnected, the control system still has low-voltage power support to complete necessary shutdown procedures, such as recording data and saving status information. This helps protect the control system from damage and ensures that the system can start normally the next time it is powered up.
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