Industrial Technology Research Institute

Yu-Choung Chang

Ching-Feng Lai

Chun-Chung Yang

Kun-I Liang

Kun-Yi Liang

Tse-Liang Hsiao

Shu-Er Huang

Ann Huang

Su Tao

Yang-Guang Liu

Chih-Cheng Yang

Hung-Chi Chen

Shou-Long Yu

Yueh-Ju Tang

Ching-Huan Tseng

Chia-Hao Hsu

Chi-Hsing Chen

Chih-Chung Lo

Ching-Eeng Tsai

Liang-Chiao Huang

Bo-Chin Wang

Liang-Qiao Huang

Ann- Huang

Ann-Huang Dummy

Zhi-Jia Liang

Shwu-Er Huang

Yang-Kuang Liu

A method for controlling a ceiling fan motor includes: setting a target value of rotational speed and a limited value of rotational torque; controlling the ceiling fan motor to operate; obtaining operation information of the ceiling fan motor; calculating a current rotational speed and a current rotational torque according to the operation information; determining whether the current rotational torque is greater than or equal to the limited value of rotational torque; performing a constant rotational torque operation when the current rotational torque is greater than or equal to the limited value of rotational torque; determining whether the current rotational speed reaches the target value of rotational speed when the current rotational torque is less than the limited value of rotational torque; performing a constant rotational speed operation when the current rotational speed reaches the target value of rotational speed; and increasing torque current of the ceiling fan motor.

Ceiling fan, method for controlling ceiling fan motor and control device for ceiling fan motor

An external rotor motor includes an inner stator and an external rotor. The external rotor includes a casing and a plurality of magnets. The casing has an annular inner wall. The annular inner wall faces the inner stator and surrounds the inner stator. The magnets are placed along the annular inner wall of the casing. The magnets surround the inner stator. An end of at least one of the magnets has a round edge, a curvature radius of the round edge is R, a thickness of the at least one of the plurality of magnets is T, and the following condition is satisfied: 0.85&#x2264;R/T&#x2264;1.

External rotor motor

An outer-rotor permanent magnet brushless motor is disclosed, which comprises an outer-rotor and an inner-stator. The outer-rotor configured with P poles, P is a natural number and denotes a multiple of 4. The inner-stator has a stator axle, and S teeth which configured on outer surface of stator, S=P&#x2212;1, S is a natural number. A circle is formed about a center of the stator axle from the center of the outer end surface. A correction angle aand an original angle a are defined from the center of the outer end surface. T The ratio of a/a is defined by the following formula: 0.2&#x3c;(a/a)&#x3c;0.6.

Outer-rotor permanent magnet brushless motor

An improved floating apparatus for scroll compressors is disclosed, which is a multi-function device integrating a temperature protection mechanism, a pressure protection mechanism and a backflow-proof mechanism and therefore substantially is a floating seal member with overheating protection, high pressure protection and backflow-proof capabilities. In detail, the present disclosure provides a floating apparatus for scroll compressors that not only can be manufactured easily, but also capable of distributing the acting force resulting from the gliding block for providing better sealing effect while preventing the scroll compressors from being damaged by high temperature and high pressure.

Floating apparatus for scroll compressors

A scroll compressor including a block, a fixed scroll, an orbiting scroll, a crankshaft, an Oldham ring and an oil passage is provided, wherein the fixed scroll is fixed on the block, and the orbiting scroll, the crankshaft and the Oldham ring are disposed on the block. The fixed scroll and the orbiting scroll form a gas-in area, a compressing area and a gas-out area which are connected in a series. The orbiting scroll is eccentric connected with the crankshaft to orbit over the fixed scroll and drive the Oldham ring moving. A reciprocating motion area on the block is formed via the reciprocating motion between the block and the Oldham ring, wherein the block has an oil opening in the reciprocating motion area. Besides, one terminal of the oil passage is connected to the oil opening, and another terminal of the oil passage is connected to the gas-in area and the compressing area.

Structure for controlling lubricant's flow rate in scroll compressor

A scroll type compressor is disclosed. The scroll type compressor includes a housing, a frame, a compartment, a separator, a scroll pairs, a slider, a plurality of compartments, at least a pressure-regulating mechanism, and a guiding element. The compartment in the housing is separated into a high-pressure compartment, a low-pressure compartment, and a middle-pressure compartment. The separator is disposed between the high-pressure compartment and the low-pressure compartment. The separator includes an outlet at the center thereof, and at least a passage through the separator. When the pressure in the high-pressure compartment is less than that in low-pressure compartment, the pressure-regulating mechanism is opened to exhaust pressure from the middle-pressure compartment to the high-pressure compartment.

Structure for preventing axial leakage in scroll compressor

A baffle plate assembly has a baffle plate comprising a back plate and a partition wall. The back plate has an inner space and is attached to the housing of the compressor. The partition wall is formed on the back plate to divide the inner space of the back plate into at least one upper guiding channel communicating with the compressing chamber in the compressor and at least one lower guiding channel communicating with the motor chamber of the compressor. Accordingly, the working fluid can be respectively led into the compressing chamber and the motor chamber of the compressor through the at least one upper guiding channel and the at least one lower guiding channel in a certain proportion. Consequently, the compressor will operate at an optimal condition.

Baffle plate assembly for a compressor

A scroll type compressor with an enhanced sealing arrangement includes two sealing rings, mounted one between a first part of a gliding block and a first chamber of a fixed scroll and another one between a second part of the gliding block and a second chamber of the fixed scroll, respectively. The sealing ring has a U-shape cross section characterized in having a center depth smaller than half of a total height of the cross section. By providing such sealing rings, damage in mounting the sealing rings can be reduced to a minimum, possible leakage from the damage can be avoided, the assembly process in producing the compressor can be improved, and the compressor can be successfully merchandized.

Scroll type compressor with an enhanced sealing arrangement

A scroll apparatus with an axial gap control function is described. The scroll apparatus is capable of controlling the axial gap between its fixed scroll and orbiting scroll. The scroll apparatus has a frame with a pair of indentations installed in the casing of the scroll apparatus, a pair of flexible elements installed at the lateral side top of the frame and spanning the pair of indentations for defining a suspended flexible segment at the span, a sidewall having a positioning ring with a downward protruding body corresponding to the indentation, in which the protruding body of the positioning ring is fixed to the flexible segment of the flexible element, a fixed scroll suspended at the positioning ring, and an orbiting scroll for orbiting into the fixed scroll.

Scroll apparatus with an axial gap control function

A scroll compressor with a backflow-proof mechanism. The scroll compressor comprises a slider disposed on a scroll couple, forming several enclosed spaces. The slider is raised by the working fluid in the spaces, preventing liquid leakage from a high-pressure chamber to a low-pressure chamber, when the scroll compressor starts. The slider descends when the compression ratio of the scroll compressor is exceeded. Thus, the pressure is released, and the performance of the scroll compressor is improved. The slider of the invention further comprises a floating element to prevent reversal of pressurized fluid and damage to the scroll couple.

Scroll compressor with backflow-proof mechanism

The present invention is a motor of rotor with built-in permanent magnet, which includes an annular stator and a rotor. The annular stator has a cylindrical interior into which the rotor is inserted. A space is formed between a circumference surface of cylindrical interior and rotor. The rotor further includes a rotor core, and a plurality of openings are formed surrounding the rotor core. Each opening is with two parallel surfaces, a top surface and a bottom surface, and each of them is a flat plate figure. A suitable distance is between two side surfaces and an outer circumference of the rotor, and the two side surfaces of adjacent openings are spaced by a channel fo suitable width. A plurality of permanent magnets are arranged in openings by way of interlaced magnetic poles, and the shape of permanent matches the shape of the opening.

Motor of rotor with built-in permanent magnet

A load-regulating device for scroll type compressors comprising a compressor housing, a bracket body, a partition block, a gliding block, a pair of scrolls and a plurality of air chambers, wherein the gliding block being coupled with the pair of scrolls for defining a plurality of air chambers on the scrolls, the pressure variation in the air chambers is then utilized for causing the motion of the gliding block, enabling the compressor to cause the gliding block by means of the pressure variation to motion upwardly as the compressor is actuated, and preventing the fluid in the high-pressure chamber from leaking towards the low-pressure chamber, thus allowing the compressors to quickly build up the pressure; the gliding block is caused by the pressure variation to motion downwardly at times when the compression ratio is excessively high, so as to relieve part of the load, thus improving the performance and reliability of the compressors.

Load-regulating device for scroll type compressors

The present invention relates to a permanent magnet rotor permanent magnet positioning and retaining device comprising a sleeve, a rotor iron core properly provided therein, a plurality of arc-shaped permanent magnets of alternation poles disposed between the sleeve and the rotor, a plurality of near triangle-shaped regions between two adjacent permanent magnets being formed by cutting off the outer perimeter corners of two adjacent permanent magnets, wherein said rotor iron core further comprises a plurality of circumferentially provided grooves for separating two arc-shaped permanent magnets of alternating poles and a plurality of dividers, each being provided between two arc-shaped permanent magnets of alternating poles; said divider, between the rotor iron core and the sleeve, further comprises a base being engaged with a groove so that the dividers are secured to the rotor iron core, a trunk capable of filling the gap between two adjacent permanent magnets to prevent said permanent magnets from moving in circumferential direction, and a near triangle-shaped rim capable of forming tight engagement with said cut-off area so as to prevent permanent magnets from moving in radial direction.

Permanent magnet rotor having magnet positioning and retaining means

The present invention relates to a permanent magnet rotor comprising a rotary iron core formed by stacking a plurality of round steel plates, and a plurality of arc-shaped permanent magnets, wherein said individual arc-shaped permanent magnets of alternation poles are provided in the corresponding openings. In particular, the present invention discloses round-cornered permanent magnets by providing round instead of sharp comers at outer perimeter of two adjacent permanent magnets so as to form triangle-shaped regions. Moreover, to prevent said open areas from being filled up, portions of steel plates or holes through steel plates opposite said open areas are removed or created, respectively, so that magnetic flux leakage is minimized and motor performance is elevated.

Motor using permanent magnet rotor

A back pressure regulation mechanism is incorporated in a scroll compressor. The compressor includes a fixed scroll and a spacing member fixed inside a casing to define a high pressure chamber behind the fixed scroll. The back pressure regulation mechanism includes a boss formed on the fixed scroll and extending through the spacing member into the high pressure chamber whereby a first force caused by pressure difference acts upon the boss and thus the fixed scroll, a plurality of bores defined in the spacing member, each bore being in communication with the high pressure chamber and the fixed scroll, and a back pressure regulation device accommodated in each bore and including a pin received in the bore and movable between upper and lower limit positions, a washer engaging the fixed scroll and a disk spring arranged between the pin and the washer. A second force caused by the pressure difference acts upon the pin and is transmitted to the fixed scroll via the disk spring and the washer. The second force is proportional to the pressure difference when the pin is moving from the upper limit position to the lower limit position and the second force becomes a constant when the pin reaches the lower limit position. The first and second forces together provide a back pressure to the fixed scroll.

Growing community of inventors

Hsinchu County, Taiwan

Yu-Choung Chang