| 摘要 |
A system for detecting a mismatch between how a motor drive is connected electrically and how it is configured for operation is disclosed. The motor drive may either be connected in a stand-alone mode to control operation of a motor from an AC source without connection to another motor drive or be connected electrically to other motor drives, for example, in a paralleled mode, shared DC bus mode, or a combination thereof. A parameter identifies the expected electrical configuration of the motor drive. The power transferred to the DC bus is compared to the power transferred from the DC bus in the motor drive. If the difference between the power transferred to the DC bus and the power transferred from the DC bus exceeds a predetermined threshold, the motor drive detects the mismatch between 110W a motor drive is connected electrically and how it is configured for operation. |
| 主权项 |
1. A method of detecting a mismatch between wiring and configuration of a motor control system configurable to operate in one of a stand-alone mode, wherein a converter and an inverter are connected independently of another converter and another inverter; a paralleled mode, wherein at least two converters each receive a common input voltage and at least two inverters connected, to the at least two converters share a DC bus; and a shared DC bus mode, wherein the converter is connected independently of another converter and at least two inverters share a. DC bus connected to the converter; the method comprising the steps of:
determining a first level of power drawn by a converter in the motor control system, wherein an input of the converter is electrically connected to an AC power source and an output of the converter is electrically connected to a DC bus in the motor control system; determining a second level of power delivered by an inverter in the motor control system, wherein an input of the inverter is electrically connected to the DC bus and an output of the inverter is electrically connected to a motor; reading a parameter from a memory device in the motor control system, the parameter identifying one of the stand-alone mode, the paralleled mode, and the shared DC bus mode in which the motor control system is configured to operate; identifying a relationship between the first level of power drawn by the converter and the second level of power delivered by the inverter as a function of the parameter defining the mode in which the motor control system is configured to operate; and detecting that the wiring is configured for one of the stand-alone mode, the paralleled mode, and the shared DC bus mode and the parameter is set to a different mode than the wiring, the different mode selected from one of the stand-alone mode, the paralleled mode, and the shared DC bus mode, when the first level of power does not match the relationship to the second level of power. |
