1、重庆升降平台/采用三角波发生电路来产生载波，载波频率需同时考虑铝合金升降机系统响应性能和高速开关阀的寿命两个因素，工程应用中，频率一般在几个Hz到几十个Hz之间，然后载波与输入控制信号进行比较，得到PWM脉宽信号。
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、当升降平台PWM为高电平时，光耦芯片的输入端为正，光耦导通工作，则引脚4输出正电压，使驱动芯片的引脚2输出控制信号，驱动场效应管工作，实现高空作业平台高速开关阀的功率放大及驱动。当PWM脉冲为低电平时，光耦截止，没有输出信号，高速开关阀不工作。
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、电路中，由于采用了场效应管来驱动高速开关阀，使得发热量大大减小，降低了系统的功率损耗，并使工作更加稳定可靠。同时，经过升降平台电阻阻值等特殊匹配，使输出产生一个瞬间的高电压脉冲，能够迅速及时地打开高速开关阀。这对于提高升降平台高速开关阀的快速响应速度、克服跃过死区具有重要的作用。
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.