Hon Hai Precision Industry Co., Ltd.

Hong-fu Jin Precision Industry (shenzhen) Co., Ltd.

Johnson Electric International Ag

Yao Zhao

Hua-Dong Cheng

Wen-Chuan Lian

Kuan-Hong Hsieh

Han-Che Wang

Bo Li

Rui Feng Qin

Jian Sun

Chun-Nan Ou

Yong Bin Li

Di Wang

Ji Yu Liang

Hai-Sheng Li

Wen-Sheng Tsai

Lin Yan

Ga Lei Hu

Tai Ping Zhou

Sheng Han

Xiao Wu Xie

Guo Dong Ren

Xian Ming Wu

An electric motor includes a stator having multiple magnetic poles and a rotor rotatably mounted to the stator. The rotor includes a shaft, a commutator and a rotor core fixed to the shaft; and windings wound on the rotor core and electrically connected to the commutator. The rotor core is formed by stacking a plurality of laminations. Each lamination includes an inner ring having a hole for fixing the shaft; an outer ring radially spaced from the inner ring; multiple teeth extending outwardly from the outer ring, and multiple ribs connecting the inner ring to the outer ring. Each rib has a width w measured in a circumferential direction of the lamination. The number of ribs is n. The width w and the number n satisfy the formula: 0.75&#x2264;n&#xd7;w&#x2264;64, where the width w is measured in millimeters.

Electric motor

An audio test apparatus, and an exemplary audio test method that includes: processing an audio file through two independent channels; outputting no signals from a left channel and from a right channel in a first time period; receiving noise signals from the left and right channels; outputting single-frequency signals from the left channel only in a second time period; receiving the single-frequency signals from the left channel and crosstalk signals from the right channel; outputting multi-frequency signals from the left and right channels in a third time period; receiving the multi-frequency signals from the left and right channels; outputting single-frequency signals from the right channel only in a fourth time period; receiving the crosstalk signals from the left channel and the single-frequency signals from the right channel; and testing parameters according to the signals received during the four time periods.

Audio test apparatus and test method thereof

A audio test method for decreasing noise influence, which includes the following steps: obtaining analog signals; converting the analog signals into digital signals; intercepting digital signals of a first predetermined length and executing a first Fast Fourier Transform (FFT), then obtaining an first Fourier spectrum; recording the amplitudes of frequency values of the first Fourier spectrum; intercepting digital signals of a second predetermined length and executing the second FFT, then obtaining an second Fourier spectrum; recording the amplitudes of the frequency values belonging to odd points of the second frequency spectrum, which are the amplitudes of the noise composition; subtracting the amplitudes of the noise composition from the amplitudes of frequency values of the first Fourier spectrum and obtaining a frequency domain signals without noise composition; executing inverse Fast Fourier Transform (iFFT) for the frequency domain signals and obtaining time domain signals, testing each parameter of the time domain signals.

Audio test apparatus capable of decreasing noise influence in process of audio device testing and method thereof

An electronic apparatus testing method is provided. The method includes the step of: reading a product ID of the electronic apparatus when the electronic apparatus is connected to a control apparatus; determining the device type ID from the product ID, wherein the product ID comprises basic information of the electronic apparatus, determining the script files of the functions of the electronic apparatus in the testing table according to the device type ID; obtaining the script files from a data storage and running the script files to test functions of the electronic apparatuses, sending a control instruction to the corresponding measuring device of the function to control the measuring device test the function during the process of running the script files; and displaying test results through a display of the control apparatus.

Control apparatus and method for controlling measuring devices to test electronic apparatuses

A fixture for test cards of testing machine includes an actuator ( ), a self-adjusting unit ( ), and a testing unit ( ). The self-adjusting unit includes a first connecting plate ( ) and a second connecting plate ( ). The first connecting plate is attached to the actuator. A first through hole ( ) is defined in each corner of the first connecting plate. A second through hole ( ) is defined in each corner of the second connecting plate. A plurality of coil springs ( ) is received in the first and second through holes respectively. A plurality of bolts ( ) is extended through the second through holes and the coil springs, and engages in the first through holes respectively. The bolts are movable relative to the second connecting plate. The testing unit is attached to the second connecting plate, and adapted for receiving test cards ( ).

Fixture for test cards of testing machine

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Shenzhen, China

Yao Zhao