Thursday, August 2, 2012

China has not set specific standards on the power of cell phone jammer

Order to adapt to the trend of development of digital control, motion control systems, most of the stepper motor, or all-digital AC servo motor as the implementation of the motor. Although both are similar in the control mode (pulse string and direction signal), but there are large differences in performance and applications. Now on both the use of performance for comparison. A control accuracy of different 45The two-phase hybrid stepping motor step angle is generally 3.6 °, 1.8 °, the five-phase hybrid stepper motor step angle of 0.72 °, 0.36 °.  The brightness of a portable  cell phone jammer  whose battery is very weak can greatly decrease.When there are a lot of transmitters, a portable  cell phone jammer 's  receiver can only store and receive signals from one  address code. The surface temperature of the stepper motor to allow the minimum amount of? Stepper motor high temperature makes the motor first magnetic demagnetization, resulting in decreased torque and even out of step, so the maximum temperature allowed by the motor surface should depend on the motor magnetic materials demagnetization points; In general, the magnetic material demagnetization points above 130 degrees Celsius, and some even as high as 200 degrees Celsius,
reactive (VR) and mixed (HB) permanent magnet stepper general two-phase, torque, and volume compared with small step angle of 7.5 degrees or 15 degrees; reaction step is generally for a three-phase, high torque output, step angle of 1.5 degrees, but the noise and vibration. 1980s in Europe and the United States and other developed countries have been eliminated; hybrid stepping mix of permanent magnet and the advantages of the reaction. It consists of two-phase and five phase: generally two-phase step angle of 1.8 degrees while the five-phase stepper angle of 0.72 degrees.  If the receivers of portable  cell phone jammer  have the same address code,  they can be controlled by a same transmitter at the same time.China has not set specific standards on the power of  cell phone jammer  which are using as teaching aids.  the dynamic indicators and terminology: 381: stepper motor step angle accuracy each turned a step angle of the actual and theoretical values of the error. Expressed as a percentage: error / step angle * 100%. Different run shot to the number of its value, when four beats running should be within 5%, eight-run shot in less than 15%. 2, out-of-step operation: when the motor is running steps, not equal to the theoretical number of steps. Called out of step. Stator tooth axis misalignment angle: rotor tooth axis offset angle, the motor is running will offset angle,
The answer is yes. Namely, a transmitter of a portable  cell phone jammer  can control different receivers. the motor drive voltage is higher the larger the motor current, the lighter the load, the smaller the size of motor, the resonance region up offset and vice versa, so that the motor output electric moment, without losing a step and the entire system noise reduction, the general point should be offset more resonance region. 8, motor reversing control: When the motor windings are energized timing AB-the BC-the CD-DA or () is a positive turn, power the timing for the reversal of DA-CD-BC-AB or ().

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