1、重慶升降平臺/采用三角波發生電路來產生載波，載波頻率需同時考慮鋁合金升降機系統響應性能和高速開關閥的壽命兩個因素，工程應用中，頻率一般在幾個Hz到幾十個Hz之間，然后載波與輸入控制信號進行比較，得到PWM脈寬信號。
Hangzhou lifting platform triangular wave generating circuit to generate the carrier, the carrier frequency must be taking aluminum lift system response lifetime performance and high-speed switching valves on two factors, engineering applications, the frequency is generally between a few Hz to tens of Hz, then the carrier is compared with the input control signal to obtain a PWM pulse width signal.

2、當升降平臺PWM為高電平時，光耦芯片的輸入端為正，光耦導通工作，則引腳4輸出正電壓，使驅動芯片的引腳2輸出控制信號，驅動場效應管工作，實現高空作業平臺高速開關閥的功率放大及驅動。當PWM脈沖為低電平時，光耦截止，沒有輸出信號，高速開關閥不工作。
When lifting platform Hangzhou PWM is high, the input of optocoupler chip is positive, the optocoupler conducting work, the pin 4 positive output voltage, the output pin 2 driver chip control signal, driving FET work aerial work platforms to achieve high-speed switching valve power amplifier and driver. When the PWM pulse is low, the optocoupler is off, there is no output signal, high-speed switching valve does not work.

3、電路中，由于采用了場效應管來驅動高速開關閥，使得發熱量大大減小，降低了系統的功率損耗，并使工作更加穩定可靠。同時，經過升降平臺電阻阻值等特殊匹配，使輸出產生一個瞬間的高電壓脈沖，能夠迅速及時地打開高速開關閥。這對于提高升降平臺高速開關閥的快速響應速度、克服躍過死區具有重要的作用。
Hangzhou lifting platform circuit, thanks to the FET to drive high-speed switching valve such that the heat is greatly reduced, reducing the power loss system, and make it more stable and reliable. At the same time, through a special matching resistor Hangzhou lifting platform, so that the output generates an instantaneous high voltage pulse that can quickly turn on the high-speed switching valve in a timely manner. This fast response speed for improving Hangzhou high-speed switching valve lifting platform, to overcome jumps over the dead zone has an important role.