Electric motor controller and related methods. One example is method of controlling an electric motor, the method comprising: calculating, by a motor controller, setpoint Q-D signals based on a setpoint speed signal, the setpoint Q-D signals represent setpoint position of a magnetic field relative to a rotor of the electric motor; serially sending, by the motor controller, the setpoint Q-D signals to a field-oriented controller disposed within a distinct packaging from the motor controller; converting, by the field-oriented controller, the setpoint Q-D signals to setpoint - signals that represent setpoint position of the magnetic field relative to A stator of the electric motor; transforming, by the field-oriented controller, the setpoint - signals into setpoint voltage signals; and gating, by the field-oriented controller, an inverter based on the setpoint voltage signals.

An power system for an electric motor vehicle includes a power electronics unit connected to battery-side terminals, motor-side terminals and power source-side terminals. The power electronics unit including a plurality of half-bridges, each of the half-bridges including a pair of switches, each of the half-bridges connecting to a respective one of the motor-side terminals, the power electronics unit being operable to direct current from a power source through an electric motor to a battery to charge the battery by repeatedly operating the electric motor in an inductor field building phase, and then an inductor field collapse phase. The power electronics unit is operable to supply current from the power source to electric motor to establish inductor fields in the electric motor in the inductor field building phase. The power electronics unit is operable to supply current from the electric motor to the battery upon a collapse of the established inductor fields in the electric motor in the inductor field collapse phase. At least one of the half-bridges of the power electronics unit includes or is directly connected to the first power source-side terminal.

An power system for an electric motor vehicle includes a power electronics unit connected to battery-side terminals, motor-side terminals and power source-side terminals. The power electronics unit including a plurality of half-bridges, each of the half-bridges including a pair of switches, each of the half-bridges connecting to a respective one of the motor-side terminals, the power electronics unit being operable to direct current from a power source through an electric motor to a battery to charge the battery by repeatedly operating the electric motor in an inductor field building phase, and then an inductor field collapse phase. The power electronics unit is operable to supply current from the power source to electric motor to establish inductor fields in the electric motor in the inductor field building phase. The power electronics unit is operable to supply current from the electric motor to the battery upon a collapse of the established inductor fields in the electric motor in the inductor field collapse phase. At least one of the half-bridges of the power electronics unit includes or is directly connected to the first power source-side terminal.

The invention relates to a method for operating an electric machine (2) comprising a rotatably mounted rotor and a motor winding that is electrically connected to an electrical energy store (4) by means of a power electronics (3). In said method, the machine (2) and/or an apparatus comprising the machine (2) is/are monitored in respect of fault events, and the motor winding is short-circuited by triggering the power electronics (3) upon detection of a fault event. According to the invention, a desired trajectory (T) for an actual current vector (i.sub.actual,dq) of an electric motor current flowing through the motor winding is ascertained, said desired trajectory (T) extending from a current actual working point (AP1) of the machine (2) to a short-circuit working point (AP2) of the machine (2), a pilot control action is predicted according to the desired trajectory (T), and the power electronics (3) are triggered to short-circuit the motor winding according to the pilot control action in such a way that when the motor winding is short-circuited, a curve (V) of the actual current vector (i.sub.actual,dq) at least substantially matches the desired trajectory (T).

The invention relates to a method for operating an electric machine (2) comprising a rotatably mounted rotor and a motor winding that is electrically connected to an electrical energy store (4) by means of a power electronics (3). In said method, the machine (2) and/or an apparatus comprising the machine (2) is/are monitored in respect of fault events, and the motor winding is short-circuited by triggering the power electronics (3) upon detection of a fault event. According to the invention, a desired trajectory (T) for an actual current vector (i.sub.actual,dq) of an electric motor current flowing through the motor winding is ascertained, said desired trajectory (T) extending from a current actual working point (AP1) of the machine (2) to a short-circuit working point (AP2) of the machine (2), a pilot control action is predicted according to the desired trajectory (T), and the power electronics (3) are triggered to short-circuit the motor winding according to the pilot control action in such a way that when the motor winding is short-circuited, a curve (V) of the actual current vector (i.sub.actual,dq) at least substantially matches the desired trajectory (T).

The invention relates to a method for operating an electric machine (2), in particular in a motor vehicle, the machine (2) comprising a rotatably mounted rotor and a motor winding that is electrically connected to an electrical energy store (4) by means of a power electronics (3). In said method, by triggering the power electronics (3), the electric machine (2) is controlled in a field-oriented manner in such a way that the machine (2) generates a specified desired torque (T.sub.target). According to the invention, when it is ascertained that based on a current actual working point (AP1) of the electric machine (2) a specified desired working point (AP2) of the electric machine (2) should be set at least substantially in a time-optimized manner, a predicted pilot control action is specified, and that the desired working point (AP2) is set by triggering the power electronics (3) according to the predicted pilot control action.

The invention relates to a method for operating an electric machine (2), in particular in a motor vehicle, the machine (2) comprising a rotatably mounted rotor and a motor winding that is electrically connected to an electrical energy store (4) by means of a power electronics (3). In said method, by triggering the power electronics (3), the electric machine (2) is controlled in a field-oriented manner in such a way that the machine (2) generates a specified desired torque (T.sub.target). According to the invention, when it is ascertained that based on a current actual working point (AP1) of the electric machine (2) a specified desired working point (AP2) of the electric machine (2) should be set at least substantially in a time-optimized manner, a predicted pilot control action is specified, and that the desired working point (AP2) is set by triggering the power electronics (3) according to the predicted pilot control action.