The present invention relates to an emergency control device for a spring return valve actuator, the device including: a power source unit for receiving an alternating current (AC) power source, converting and stepping down an AC voltage of the received AC power source to a given direct current (DC) voltage, and supplying the DC voltage, and transmitting a signal as to whether the power source is supplied; a charge unit for receiving the DC voltage from the power source unit to store electrical energy with a given voltage; and a control unit for receiving the DC voltage from the power source unit to supply the received DC voltage to the electromagnetic brake, and if a power source cutoff signal is received from the power source unit, for supplying the electrical energy stored in the charge unit to the electromagnetic brake for a given set time.

The present invention relates to an emergency control device for a spring return valve actuator, the device including: a power source unit for receiving an alternating current (AC) power source, converting and stepping down an AC voltage of the received AC power source to a given direct current (DC) voltage, and supplying the DC voltage, and transmitting a signal as to whether the power source is supplied; a charge unit for receiving the DC voltage from the power source unit to store electrical energy with a given voltage; and a control unit for receiving the DC voltage from the power source unit to supply the received DC voltage to the electromagnetic brake, and if a power source cutoff signal is received from the power source unit, for supplying the electrical energy stored in the charge unit to the electromagnetic brake for a given set time.

A vacuum pump and a motor controller that make a safe transition to a regeneration mode while avoiding an overvoltage are provided. A turbo molecular pump includes a power supply unit that converts alternating-current power to direct-current power and outputs the power, the alternating-current power being obtained from an alternating-current power supply, and the motor controller that controls a motor. The motor controller includes: a motor driving circuit that drives the motor when receiving direct-current power or regenerated power; a backflow prevention diode interposed between the power supply unit and the motor driving circuit; a power-failure detection circuit that detects a primary voltage of the backflow prevention diode; a driving-voltage sensing circuit that detects a secondary voltage of the backflow prevention diode; and a motor control circuit that determines, when the primary voltage drops to a predetermined power-failure detection threshold value, whether a power failure is a primary power failure of the alternating-current power or a secondary power failure of the direct-current power based on a voltage difference between the primary voltage and the secondary voltage, and controls the motor driving circuit so as to enter a regeneration mode.

A vacuum pump and a motor controller that make a safe transition to a regeneration mode while avoiding an overvoltage are provided. A turbo molecular pump includes a power supply unit that converts alternating-current power to direct-current power and outputs the power, the alternating-current power being obtained from an alternating-current power supply, and the motor controller that controls a motor. The motor controller includes: a motor driving circuit that drives the motor when receiving direct-current power or regenerated power; a backflow prevention diode interposed between the power supply unit and the motor driving circuit; a power-failure detection circuit that detects a primary voltage of the backflow prevention diode; a driving-voltage sensing circuit that detects a secondary voltage of the backflow prevention diode; and a motor control circuit that determines, when the primary voltage drops to a predetermined power-failure detection threshold value, whether a power failure is a primary power failure of the alternating-current power or a secondary power failure of the direct-current power based on a voltage difference between the primary voltage and the secondary voltage, and controls the motor driving circuit so as to enter a regeneration mode.

In a method for generating a blocking moment in a standstill state of an electrically commutated electric motor having at least two windings, on which electric motor a possibly varying load moment acts from outside in the standstill state, first, a blocking current is supplied at a maximum value into a first winding. This blocking current is successively reduced to, possibly, a minimum value. From that moment the inductivity of the electric motor is controlled, namely by controlling the blocking current if the control deviation between the actual value and the set value of the inductivity exceeds a predetermined threshold value. Thereby, it is possible to control the blocking current in an adaptive manner insofar as, despite a varying load moment, the standstill state of the electric motor can be maintained by varying the blocking current.

In a method for generating a blocking moment in a standstill state of an electrically commutated electric motor having at least two windings, on which electric motor a possibly varying load moment acts from outside in the standstill state, first, a blocking current is supplied at a maximum value into a first winding. This blocking current is successively reduced to, possibly, a minimum value. From that moment the inductivity of the electric motor is controlled, namely by controlling the blocking current if the control deviation between the actual value and the set value of the inductivity exceeds a predetermined threshold value. Thereby, it is possible to control the blocking current in an adaptive manner insofar as, despite a varying load moment, the standstill state of the electric motor can be maintained by varying the blocking current.

The present invention refers to a window sun blind arrangement having a control circuit, which comprises at least one braking unit having a braking MOSFET-switch M2. The braking unit is configured to introduce an electrical power within the control circuit after decoupling the control circuit from an electric power supply into the motor unit in a reverse direction, as compared to its original operating direction, for braking its current movement. Moreover, the present invention refers to an appropriate control circuit, to a vehicle with such a window sun blind arrangement or control circuit and to various methods for operating such window sun blind arrangements.

Example motor assemblies for architectural coverings are described herein. An example motor assembly includes a motor, a first switch to trigger the motor to retract an architectural covering, a second switch to trigger the motor to extend the architectural covering, and an actuator positioned to activate the first switch when the actuator is rotated in a first direction and to activate the second switch when the actuator is rotated in a second direction. Also described herein are example lever actuators for motor assemblies of architectural coverings. An example lever actuator detaches from the motor assembly to prevent excess force on the motor assembly that could otherwise detrimentally affect the motor assembly.

A solar tracker having a brake function is disclosed. The solar tracker according to an embodiment of the present invention relates to a technology having a dual position sensing device provided at a part at which altitude adjustment and horizontal rotation of a solar collector plate respectively end, such that a brake is accurately operated for a driving motor, which is respectively in charge of altitude adjustment and horizontal rotation.

A solar tracker having a brake function is disclosed. The solar tracker according to an embodiment of the present invention relates to a technology having a dual position sensing device provided at a part at which altitude adjustment and horizontal rotation of a solar collector plate respectively end, such that a brake is accurately operated for a driving motor, which is respectively in charge of altitude adjustment and horizontal rotation.