Abstract:
Systems and methods for testing a motor drive are disclosed. The techniques enhance motor drive testing by not using a dyne-unit, thereby reducing the initial installation costs, maintenance costs, and size of the setup. The setup may include a rectifier and an inverter configured to operate in an active-reactive power control mode during testing under a simulated load by generating the corresponding active (P) and reactive (Q) power (e.g., torque and flux, respectively). The active-reactive power control mode may receive a desired P and Q and determine one or more gate drive signals to provide to switches in the rectifier and/or the inverter based on the desired P and Q, where the gate drive signals are configured to operate the rectifier and/or the inverter under a simulated load. The gate drive signals may be transmitted to the rectifier and/or the inverter accordingly.
Abstract:
Systems, methods, and devices are provided for coupling a direct current (DC) pre-charging circuit to a motor drive. In one embodiment, an industrial automation device may include an enclosed module that may include a pre-charge circuit. The pre-charge circuit may pre-charge a direct current (DC) bus. Further, the DC bus may couple to an inverter. The enclosed module may also include a power input that may couple the pre-charge circuit to a DC power source and an electrical output structure that may couple the pre-charge circuit to the inverter. Additionally, the pre-charge circuit may be removeably coupled to the inverter and the DC power source via a sliding action of the enclosed module.
Abstract:
Systems and methods for testing a motor drive are disclosed. The techniques enhance motor drive testing by not using a dyne-unit, thereby reducing the initial installation costs, maintenance costs, and size of the setup. The setup may include a rectifier and an inverter configured to operate in an active-reactive power control mode during testing under a simulated load by generating the corresponding active (P) and reactive (Q) power (e.g., torque and flux, respectively). The active-reactive power control mode may receive a desired P and Q and determine one or more gate drive signals to provide to switches in the rectifier and/or the inverter based on the desired P and Q, where the gate drive signals are configured to operate the rectifier and/or the inverter under a simulated load. The gate drive signals may be transmitted to the rectifier and/or the inverter accordingly.
Abstract:
Methods and apparatus are presented for controlling a power converter to protect input filter inductors from overheating, in which an active front end (AFE) rectifier is operated in a boost mode to provide a boosted DC voltage at a derated output current value selected according to the DC bus voltage boost amount corresponding to a maximum load condition for which the filter inductors will not overheat.
Abstract:
Systems and methods are provided for pre-charging the DC bus on a motor drive. Pre-charging techniques involve pre-charge circuitry including a manual switch, an automatic switch, and pre-charge control circuitry to switch the automatic switch between pre-charge and pre-charge bypass modes in response to an initialized pre-charge operation, input voltage sags, and so forth. In some embodiments, the pre-charge operation may be initialized by switching the manual switch closed. In some embodiments, the pre-charge operation may also be initialized by a detected voltage sag on the DC bus. The pre-charge circuitry may also be configured to disconnect to isolate a motor drive from the common DC bus under certain fault conditions.
Abstract:
Methods and apparatus are presented for controlling a power converter to protect input filter inductors from overheating, in which an active front end (AFE) rectifier is operated in a boost mode to provide a boosted DC voltage at a derated output current value selected according to the DC bus voltage boost amount corresponding to a maximum load condition for which the filter inductors will not overheat.
Abstract:
Systems, methods, and devices are provided for coupling a direct current (DC) pre-charging circuit to a motor drive. In one embodiment, an industrial automation device may include an enclosed module that may include a pre-charge circuit. The pre-charge circuit may pre-charge a direct current (DC) bus. Further, the DC bus may couple to an inverter. The enclosed module may also include a power input that may couple the pre-charge circuit to a DC power source and an electrical output structure that may couple the pre-charge circuit to the inverter. Additionally, the pre-charge circuit may be removeably coupled to the inverter and the DC power source via a sliding action of the enclosed module.
Abstract:
Systems and methods are provided for pre-charging the DC bus on a motor drive. Pre-charging techniques involve pre-charge circuitry including a manual switch, an automatic switch, and pre-charge control circuitry to switch the automatic switch between pre-charge and pre-charge bypass modes in response to an initialized pre-charge operation, input voltage sags, and so forth. In some embodiments, the pre-charge operation may be initialized by switching the manual switch closed. In some embodiments, the pre-charge operation may also be initialized by a detected voltage sag on the DC bus. The pre-charge circuitry may also be configured to disconnect to isolate a motor drive from the common DC bus under certain fault conditions.