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收录机电机稳速电路可分为机械式稳速和电子稳速两大类,机械式稳速早已被电子稳速所取代。电子稳速电路具有调节方便、性能稳定等优点,但它又是收录机中发生故障率较高的部分之一。随着集成电路工艺的发展,由于稳速电路大多采用集成电路式的,有的还和其他部分电路合并于一块集成块中。这样,部分损坏了就把整块集成块丢弃有点可惜,还有就是单块的电机稳速集成块,损坏后因难以购到该型号集成块而一筹莫展。其实,完全可以用常见元件来制作一小块稳速电路来代替损坏的稳速电路。下面,笔者就向大家介绍三款简单易制的电机稳速电路。图1是分立式元件电机稳速电路,它能自动补尝电源电压及电机负载的变化。电机电流受 T1控制,T1
Tape recorders motor speed circuit can be divided into mechanical speed and electronic speed stable two categories, mechanical speed stability has long been replaced by electronic speed. Electronic speed control circuit has the advantages of easy adjustment, stable performance, etc., but it is one of the higher failure rate in the tape recorders. With the development of integrated circuit technology, due to the steady-state circuits are mostly integrated circuit type, and some and other parts of the circuit merged in a block. In this way, it is a pity to discard the monolithic block if it is partially damaged, and there is a monolithic motorized monolithic block that can not be dealt with after being damaged because it is difficult to purchase the monolithic block. In fact, it is entirely possible to use a common component to make a small steady-state circuit to replace the damaged steady-state circuit. Below, I will introduce to you three simple and easy-motor steady speed circuit. Figure 1 is a discrete component motor speed circuit, it can automatically compensate for the power supply voltage and motor load changes. Motor current controlled by T1, T1