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.

A positional variance based distance sensing apparatus has a physical marker that changes its position (either rotational or linear) in accordance to the distance of an object from the sensor. This positional change can be used to sense the distance using touch by humans. This positional variance can also be used to control triggers like switches, leavers, and steering based controllers.

A positional variance based distance sensing apparatus has a physical marker that changes its position (either rotational or linear) in accordance to the distance of an object from the sensor. This positional change can be used to sense the distance using touch by humans. This positional variance can also be used to control triggers like switches, leavers, and steering based controllers.

A miniature mechanical shutter having a chamber, a shutter member having an aperture formed therethrough that is mounted to the chamber to allow translation and rotation about an axis. A pair of cap members are disposed on opposing ends of the shutter member to support the shutter member during the translation and rotation. The shutter further comprising a plurality of magnet members, such that a first of the plurality of magnet members is disposed in a first end of the shutter member, a second of the plurality of magnet members is disposed in a second end of the shutter member opposite the first end, and a third of the plurality of magnets members is disposed external to the chamber. At least one of the plurality of magnet members is responsive to an electrical impulse to translate and/or rotate the shutter member between an opened position and a closed position.

A control valve includes a shaft, a stopper mechanism, and a can. A stator coil is coaxially mounted around the can. Positions in a rotating direction of the rotor and the stator when the shaft is stopped by an operation of the stopper mechanism are set to be reference positions at which magnetic poles of the stator and those of the rotor are opposite to each other. The rotor is configured to be stopped at the reference position by an arrangement of the stopper mechanism. The stator coil is positioned relative to the body according to a positional relation between a fitting part formed on surfaces of the stator and the body attached to each other and an insertion part where the can is inserted into the stator, and magnetic poles of the stator and those of the rotor are made opposite to each other at the reference positions.

A control valve includes a shaft, a stopper mechanism, and a can. A stator coil is coaxially mounted around the can. Positions in a rotating direction of the rotor and the stator when the shaft is stopped by an operation of the stopper mechanism are set to be reference positions at which magnetic poles of the stator and those of the rotor are opposite to each other. The rotor is configured to be stopped at the reference position by an arrangement of the stopper mechanism. The stator coil is positioned relative to the body according to a positional relation between a fitting part formed on surfaces of the stator and the body attached to each other and an insertion part where the can is inserted into the stator, and magnetic poles of the stator and those of the rotor are made opposite to each other at the reference positions.

A reciprocating electric motor includes a housing, a stator member disposed in the housing, a reciprocating armature movable relative to the housing, and a controller. The stator member includes first and second. electromagnet units opposite to each other in a longitudinal direction of the housing. The reciprocating armature includes first and second elongated pole units each of which is moved into register with a corresponding one of the first and second electromagnet units when the corresponding one of the first and second electromagnet units is energized. The controller is configured to alternately energize the first and second electromagnet units to cause reciprocating movement of the reciprocating armature.

A stepping motors includes a bracket including a first protruding line and a second protruding line formed on both sides, a stator and a rotor disposed on the bracket, a lead screw coupled with the rotor, and a moving member which moves back and forth according to a rotation of the lead screw, in which the moving member includes a first guide groove which slides on the first protruding line and a second guide groove which slides on the second protruding line, and the first guide groove and the second guide groove include first sections which have widths corresponding to the first protruding line and the second protruding line, respectively, and second sections which have greater widths than the first sections.

A stepping motors includes a bracket including a first protruding line and a second protruding line formed on both sides, a stator and a rotor disposed on the bracket, a lead screw coupled with the rotor, and a moving member which moves back and forth according to a rotation of the lead screw, in which the moving member includes a first guide groove which slides on the first protruding line and a second guide groove which slides on the second protruding line, and the first guide groove and the second guide groove include first sections which have widths corresponding to the first protruding line and the second protruding line, respectively, and second sections which have greater widths than the first sections.

The purpose of the present invention is to provide a electric generator which has a simple structure while sufficiently suppressing cogging torque. A electric generator is constituted by a rotor section comprising a plurality of protrusions which is arranged linearly with constant pitch at mutually separated positions sandwiching permanent magnets, and a stator section which has a stator member comprising stator yokes, permanent magnets facing the permanent magnets, and protrusions which protrude closer to the rotor section than the permanent magnets and are arranged linearly with constant pitch at mutually separated positions sandwiching the permanent magnets, the stator member being configured such that the protrusions and the protrusions are shifted from each other by a half pitch between adjoining stator members. Further, the rotor section-side protrusions may be shifted by a half pitch instead of the stator section-side protrusions.