What types of DC regulated power supplies are there?
1. Chemical source of energy.
All of the chemical power sources we often use—dry batteries, lead-acid batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and lithium-ion batteries—have pros and cons of their own. The advancement of science and technology has led to the emergence of smart batteries. American researchers have found a manganese iodide that may be used to create inexpensive, tiny, long-lasting rechargeable batteries that operate well even after repeated charging. This is an environmentally responsible approach to producing rechargeable batteries.
2. Power supply with linear DC regulation.
The DC regulated power supply in which the regulating tube operates in a linear state is referred to as a linear DC controlled power supply. Power frequency transformer, output rectifier filter, control circuit, protection circuit, etc. are the essential components of a linear DC regulated power supply. Alternating current is converted by the linear DC regulated power supply, which then filters and rectifies it through a rectifier circuit to produce an unstable DC voltage. The output voltage must be adjusted via voltage feedback to provide a high-precision DC voltage. This voltage can be produced with minimal ripple, high stability, and no noise or interference from the switching regulated power supply.
Its drawbacks are that it needs a big, heavy transformer, the necessary filter capacitor has a huge volume and weight, and the voltage feedback circuit only functions in a linear condition. The regulating tube has a specific voltage drop. Large running current output will result in high heat dissipation in the regulating tube, low conversion efficiency, and excessive power consumption.
3. Change to a steady DC power source.
A power supply that uses cutting-edge power electronics technology to regulate the transistors' switching time ratio and sustain a steady output voltage is known as a switching DC stable power supply, or witting stable power supply. The single-ended flyback, single-ended forward, half-bridge, push-pull, full-bridge, and other circuit shapes are the most common ones.
Input grid filter, input rectifier filter, inverter, output rectifier filter, control circuit, and protection circuit are the key components of the basic switching DC stable power supply. Switching DC regulated power supplies have the benefits of portability, stability, and dependability. One drawback of using a linear DC controlled power supply is that ripple is typically much larger (≤ 1).
