PURPOSE:To prevent the magnetic sound of a motor from increasing and to convert the sound into a convenient sound by differentiating a carrier frequency for PWM control of PWM power converters respectively provided for a plurality of motors for supplying variable voltages in predetermined relationship....
PROBLEM TO BE SOLVED: To provide a radio wave data measuring apparatus for analyzing a frequency and a pulse with one system constitution, easily altering a compression ratio by enlarging a frequency to be analyzed. SOLUTION: The ratio wave data measuring apparatus comprises an A-D converter 5 ...
CONSTITUTION:In order to prevent a DC power source from short-circuiting due to the simultaneous conduction of the upper and lower switches of a bridge of a main circuit of a high frequency PWM inverter when the upper and lower switches are switched ON and OFF, a dead time td is provided...
Select audio frequency:no change8000 Hz11025 Hz16000 Hz22050 Hz24000 Hz32000 Hz44100 Hz48000 Hz96000 Hzno change8000 Hz11025 Hz16000 Hz22050 Hz24000 Hz32000 Hz44100 Hz48000 Hz96000 Hzno change8000 Hz11025 Hz16000 Hz22050 Hz24000 Hz32000 Hz44100 Hz48000 Hz96000 Hzno change1000 Hz8000 ...
Firstly, the DC power from the solar panels is converted into a high-frequency AC signal using power electronics. Then, this AC signal is transformed into the desired AC output voltage and frequency using pulse width modulation techniques. This allows for efficient and reliable conversion of solar...
Circuitry to replace the thermistor on a temperature-controlled fan with PWM. As per the PWM fan control specifications, the speed control signal is a 5-volt digital signal, with a frequency of approximately 25 kHz and a variable duty cycle of 30-100%, and is a non-inverting signal. Thi...
Circuit mode IGBT VPMW pulse width modulation method AC input 1 phase 2 line + G 220V/50HZ, 60HZ Output Phases Three phase Low voltage 0V-260V (customizable according to customer requirements) high voltage 0V-520V (customizable according to customer requirements) Frequency 4...
Circuit model IGBT/SPWMpulse width adjustment mode Input Phase three phase Voltage 380V±10% Frequency 50Hz/60Hz/±10% Output Phase three phase four wire Waveform SINE WAVE Voltage phase voltage Rated:115V,0-150V Continuing Adjust Wire voltage Rated:200V,0-260V Continuing Adjust Load st...
PulseWidth = 1 / OutputClock microseconds FiperFreq1 = desired frequency in Hz FiperDiv1 = 1000000 * OutputClock / FiperFreq1 tmr_fiper1 = tmr_prsc * tclk_period * FiperDiv1 - tclk_period max_adj = 1000000000 * (FreqDivRatio - 1.0) - 1 The calculation for tmr_fiper2 is the same...
Most high-power DC-to-AC converters use an H-bridge configuration (four power devices) for exciting the high-frequency transformer. The H-bridge is controlled with pulse-width modulation (PWM) or other modulation strategies to produce a voltage of limited pulse width or amplitude. Modulation of...