A motor assembly includes a housing having a motor cavity. A stator is disposed within the housing. A rotor rotates within the stator and within the motor cavity about a rotational axis. A controller is coupled with the stator having a filter circuit board and a main circuit board that are interconnected at a terminal header to define a multilayer circuit board assembly. The circuit board assembly has an electrical interface and a data interface attached to at least one of the filter circuit board and the main circuit board.

A switch-on unit for a tool of a movable unit of a linear transport system can be fastened to the movable unit. The switch-on unit includes a housing, an energy-receiving coil with energy-receiving electronics, and a movable antenna with communication electronics. The energy-receiving electronics and the communication electronics are disposed on at least a first circuit board within the housing. The housing has an opening for connections of the tool and an installation space for application electronics. A first circuit board has a first interface for the application electronics, with a power supply and communication link. The communication electronics are arranged to receive a first data signal via the movable antenna, to calculate a second data signal from information about a data structure of the first data signal and the first data signal, and to provide the second data signal at the communication link.

A switch-on unit for a tool of a movable unit of a linear transport system can be fastened to the movable unit. The switch-on unit includes a housing, an energy-receiving coil with energy-receiving electronics, and a movable antenna with communication electronics. The energy-receiving electronics and the communication electronics are disposed on at least a first circuit board within the housing. The housing has an opening for connections of the tool and an installation space for application electronics. A first circuit board has a first interface for the application electronics, with a power supply and communication link. The communication electronics are arranged to receive a first data signal via the movable antenna, to calculate a second data signal from information about a data structure of the first data signal and the first data signal, and to provide the second data signal at the communication link.

A servo actuator controlling system includes a master controller and a number of servo actuators coupled to at least one interface of the master controller. The master controller includes a master MCU and a number of interfaces connected to the master MCU via a first bus. Each servo actuator includes a servo MCU, a first interface coupled to the servo MCU via a second bus, a second interface coupled the first Interface and the serve MCU, a first servo switch connected between the first interface and the servo MCU, and a second servo switch connected between the second interface and the servo MCU. The first servo switch is set to turn on or off the first interface and the second servo switch is set to turn on or off the second interface.

A servo actuator controlling system includes a master controller and a number of servo actuators coupled to at least one interface of the master controller. The master controller includes a master MCU and a number of interfaces connected to the master MCU via a first bus. Each servo actuator includes a servo MCU, a first interface coupled to the servo MCU via a second bus, a second interface coupled the first Interface and the serve MCU, a first servo switch connected between the first interface and the servo MCU, and a second servo switch connected between the second interface and the servo MCU. The first servo switch is set to turn on or off the first interface and the second servo switch is set to turn on or off the second interface.

An electrical power conversion apparatus is obtained which can accurately estimate a temperature of a rotating machine when a state of its cooling device for cooling it changes, and reliably carry out its protective operation, so that its failure to be brought about because of its high temperature state can be prevented. A control device of the apparatus comprises: a rotating machine losses calculator for calculating losses of the rotating machine by using its output status; a cooling-device state estimation device for estimating a state of the cooling device from a temperature detection value of a temperature detector for detecting a temperature of the rotating machine; and a rotating machine temperature calculation device for estimating a temperature at a predetermined position of the rotating machine, based on a rotating machine's losses calculation value of the rotating machine losses calculator and an estimation result of the cooling-device state estimation device.

An electrical power conversion apparatus is obtained which can accurately estimate a temperature of a rotating machine when a state of its cooling device for cooling it changes, and reliably carry out its protective operation, so that its failure to be brought about because of its high temperature state can be prevented. A control device of the apparatus comprises: a rotating machine losses calculator for calculating losses of the rotating machine by using its output status; a cooling-device state estimation device for estimating a state of the cooling device from a temperature detection value of a temperature detector for detecting a temperature of the rotating machine; and a rotating machine temperature calculation device for estimating a temperature at a predetermined position of the rotating machine, based on a rotating machine's losses calculation value of the rotating machine losses calculator and an estimation result of the cooling-device state estimation device.

A method of monitoring the performance of a multi-phase electric motor (13), wherein the electric motor comprises a plurality of stator windings (7, 8, 9) connected in a wye configuration to form a wye point. The method comprises measuring an electrical characteristic of the wye point in a time domain; based upon the measured electrical characteristic of the wye point in the time domain, determining an electrical characteristic of the wye point in the frequency domain; and deriving data indicative of at least one parameter of the performance of the electric motor based upon the determined electrical characteristic of the wye-point in the frequency domain.

A method of monitoring the performance of a multi-phase electric motor (13), wherein the electric motor comprises a plurality of stator windings (7, 8, 9) connected in a wye configuration to form a wye point. The method comprises measuring an electrical characteristic of the wye point in a time domain; based upon the measured electrical characteristic of the wye point in the time domain, determining an electrical characteristic of the wye point in the frequency domain; and deriving data indicative of at least one parameter of the performance of the electric motor based upon the determined electrical characteristic of the wye-point in the frequency domain.

An electric motor communication system for use with a fluid moving system and using at least one wireless sensor network is provided. The electric motor communication system includes an electric motor that includes a motor management device configured to transmit and receive input signals via the wireless sensor network, and a processing device coupled to said motor management device and configured to control said electric motor based at least in part on input signals received at said motor management device. The electric motor communication system also includes at least one external device configured to collect data and to transmit said input signals, via the wireless sensor network, to said electric motor.