In an embodiment, an apparatus includes a radio frequency (RF) generator that is to generate a RF signal, first and second electrodes, and an impedance match module in series between the RF generator and the first electrode. The RF generator detects reflected power from the RF signal applied to a load electrically coupled between the first and second electrodes to change a temperature of the load, the RF signal to be applied to the load until the reflected power reaches a particular value.

In an embodiment, an apparatus includes a radio frequency (RF) generator that is to generate a RF signal, first and second electrodes, and an impedance match module in series between the RF generator and the first electrode. The RF generator detects reflected power from the RF signal applied to a load electrically coupled between the first and second electrodes to change a temperature of the load, the RF signal to be applied to the load until the reflected power reaches a particular value.

An HVAC system comprising: an appliance; a control assembly; a first motor; and a second motor. The control assembly: applies a electric signal to the first terminal of the first winding of the first motor for a number of intervals of time; afterwards, apply a second signal to the first terminal of the first winding; apply the first electric signal to the first terminal of the second winding for a second number of regular intervals of time; and after the application of the first electric signal to the first terminal of the second winding, apply the second electric signal to the first terminal of the second winding of the second motor; wherein the first number of regular intervals of time and the second number of regular intervals of time differ by one regular interval of time.

Disclosed is an air pressure control (APC) device according to an embodiment of the inventive concept. The air pressure control (APC) device may include a processing chamber, a plate for adjusting a pressure in the processing chamber, and an APC valve including first and second step motors for adjusting a height of the plate, and an APC controller that controls the APC valve, and the APC controller may include a first controller that controls positions of the first step motor and the second step motor; and a second controller that compensates for a difference in position between the first step motor and the second step motor.

A driving device includes: a first motor that transmits power to a rotation shaft of a conveyance roller for conveying a paper sheet; a second motor that transmits power to the rotation shaft of the conveyance roller; and a motor controller that controls rotational speeds of the first and second motors by changing a control value, wherein the motor controller controls the control value of the first motor at multiple steps at a time of acceleration or deceleration and changes the control value of the second motor according to a change range of the control value of the first motor in synchronization with a timing when the control value of the first motor is changed.

An image forming apparatus includes a photosensitive member, an intermediate transfer member, a moving member, a driving motor, a stepper motor, a detector, a phase determiner, and a controller. The stepper motor drives the moving member to move between a first position at which the photosensitive member contacts the intermediate transfer member and a second position at which the photosensitive member contacts the intermediate transfer member are separated. The controller includes a first control mode to control a motor based on a predetermined current magnitude and a second control mode to control a motor by vector control. The controller starts driving the driving motor in the first control mode, and then switches from the first control mode to the second control mode. The controller controls the stepper motor in the first control mode during a period from when the stepper motor is activated to when the stepper motor is stopped.

A particle beam apparatus and/or a light microscope is operated. A first temperature of an object may be changed, where the object may be arranged on an object receiving device rendered movable by a motor operated by a supply current. Changing the first temperature of the object may alter a second temperature of the object-receiving device from a first temperature value to a second temperature value. The supply current of the motor may be changed from a first current value to a second current value, where the supply current is designed to hold the object-receiving device in position, and a temperature of the object-receiving device may be changed from the second temperature value to a third temperature value on account of heat generated by the motor, which may be obtained by the second current value of the supply current and fed to the object receiving device.

A method for operating a pressure control device in a vehicle, in particular in a motor vehicle, wherein current is supplied by an energy source of the vehicle for operating the pressure control device, as a result of which the pressure control device carries out at least one pressure control function, for which at least two actuators of the pressure control device are actuated, wherein at least one current required at maximum for actuating the actuator is determined for each actuator and current budget management for actuating the actuators and/or for carrying out the pressure control functions is performed by the determined currents required at maximum. In addition, the invention relates to a pressure control device for carrying out the method.

A method for operating a pressure control device in a vehicle, in particular in a motor vehicle, wherein current is supplied by an energy source of the vehicle for operating the pressure control device, as a result of which the pressure control device carries out at least one pressure control function, for which at least two actuators of the pressure control device are actuated, wherein at least one current required at maximum for actuating the actuator is determined for each actuator and current budget management for actuating the actuators and/or for carrying out the pressure control functions is performed by the determined currents required at maximum. In addition, the invention relates to a pressure control device for carrying out the method.

A lens control device, comprising a first stepping motor that drives a zoom lens contained in the photographing lens, a second stepping motor that drives a focus lens contained in the photographing lens, and a processor that controls the first stepping motor and the second stepping motor, whereby, within a given section in which the zoom lens and the focus lens are driven, there is a period in which at least one of the first stepping motor and the second stepping motor is driven at a constant rate, and the processor makes a time, required to move the specified section with a specified number of pulses, a specified time.