Chapter 1: What is an electric tricycle DC chopper
The DC chopper, also known as the chopper, is a DC power supply device with a fixed voltage value converted into a DC power supply device with a variable voltage value.
It is a DC to DC converter that has been widely used, such as the speed of a DC motor.
Control, switching power supply.
DC chopping is to convert a fixed DC voltage into a variable DC voltage, also known as DC/DC conversion.
There are two working modes of the chopper, one is the pulse width modulation mode, the Ts (period) is unchanged, and the Ton is changed (generally,
Ton is the time when the switch is turned on each time), the second is the frequency modulation mode, the Ton is unchanged, Change Ts (prone to interference).
Chapter 2: What is the working principle of the electric tricycle DC chopper?
The DC chopper uses power components to properly cut the fixed voltage power supply to achieve the purpose of changing the voltage at the load terminal.
If its output voltage is lower than the input power supply voltage, it is called a Buck DC chopper, and if its output voltage is higher than the input power supply voltage, it is called a Boost DC chopper.
When the DC chopper is turned on (Ton), the voltage Vo of the load terminal is equal to the power supply voltage Vs, and when the DC chopper is turned off (Toff), the voltage Vo of the load terminal is 0,
so the appropriate control of the DC chopper can To make the DC power supply intermittently appear on the load side, as long as the on-time of the DC chopper is controlled, the average voltage of the load can be changed.
The peak value of the output voltage is equal to the power supply voltage Vs, and the average value Vo of the output voltage varies with Ton time. The most common changes are the following three points:
The period T is fixed and the on-time Ton changes, which is called Pulse-width Modulation PWM.
The on-time Ton is fixed and the period T changes, which is called Frequency Modulation FM.
The period T and the on-time Ton are changed at the same time, that is, the width modulation and the frequency modulation are mixed.
In practical applications, because the DC chopper often needs to connect a filter inductor and a filter capacitor at the load end, if the frequency changes too much, the inductance and capacitor will be greatly affected, so most of them use pulse width modulation.
Chapter 3: Conclusion
An electric tricycle is a means of transportation composed of a variety of parts, of which the knowledge is extensive and profound. More details welcome to subscribe
