Shanghai Zi Cong Electrical Equipment Co., questions about your product, contact our technical engineers: 021-51086047 (30 lines), or 18,917,550,265 Wang. SSD512C non-regenerative power to 9KW Isolated control circuit board, the control panel can be used as a user device, absolutely linearization control allows 512C series is suitable for low-power single drive or multi-drive applications. Single-phase power supply, 512C applies to control and a permanent magnet or shunt DC motor speed and torque specifications analog inputs: 4, speed reference / auxiliary reference / torque or current limit (10V DC) / Tacho feedback (maximum 350V DC) analog outputs: 4 slope given / speed / Integrated given / armature current (5V DC) Digital inputs: 2, start running (10V to 24V DC) / stall override (10V) digital output: 2, condition monitoring / zero speed (24V 50MA) Reference voltage: 2, -10V DC / 10V DC LED self-diagnosis display: power, stall, over-current protection continental 590P / 500A DC converter dedicated SCR module, price, performance high. First, the concept and structure of the SCR SCR also known as thyristors. Since the advent of the 1950s has evolved into a large family, it is a key member of the one-way thyristor, triac, light control thyristor, reverse conducting thyristor, GTO, fast thyristor, and so on. Today, we are using a one-way thyristor, thyristor is commonly known as ordinary, it is composed of four layers of semiconductor material, there are three PN junction, there are three external electrode [Figure (a)]: The first layer of P-type semiconductor lead-out electrode called the anode A, the third P-type semiconductor layer lead-out electrode is called the control electrode G, the fourth N-type semiconductor layer, an electrode called a cathode lead K. Can be seen from the transistor circuit symbols [Figure (b)], and the diode as it is a unidirectional conducting device, the key is more than one control electrode G, which makes it has a completely different diode operating characteristics. Second, the SCR's main operating characteristics in order to be able to intuitively recognize SCR operating characteristics, we look at this teaching board (Figure). SCR VS EL and small bulbs together, through the switch S connected to the DC power supply. Note that the anode A is connected to the power of positive and negative power supply connected to the cathode K, and a control electrode G cathode connected via a push button switch SB 3V DC power supply (here is KP5 type SCR, the use of KP1 type, should be connected to 1.5 V DC power supply positive). This connection with the thyristor power supply is called the forward connection, i.e., to the anode of the thyristor and the gate are applied forward voltage. Now we are on the power switch S, a small light bulb does not light, there is no description SCR conduction; then click the button to switch SB, a trigger input to the control electrode voltage, a small light bulb, indicating a thyristor. The demonstration experiment gives us what inspired it? This experiment tells us, to make thyristor, one between its anode and cathode K A positive voltage is applied, the second is in its control electrode G and cathode Enter between K a positive trigger voltage. After the thyristor, release the button switch, remove the trigger voltage and still maintain the conduction state. SCR characteristics: It is "imminent." However, if the control electrode anode or reverse voltage is applied, the SCR can not be turned on. The role of the control electrode by applying a positive trigger pulse to thyristor, but can not make it off. So, the method used to make the turn-off thyristor conduction it? Make conducting thyristor is turned off, the anode can disconnect power source (switch S) or to maintain the anode current is less than the minimum conduction (called holding current). If the SCR between the anode and cathode are applied AC voltage or pulsating DC voltage, then the voltage passes through zero, the SCR will go off. Third, use a multimeter can distinguish three electrodes SCR, testing the quality of ordinary thyristor SCR three electrodes can be measured with a multimeter ohm block R × 100 gear. SCR G, is a PN junction between K, equivalent to a diode, G is positive, K is negative, therefore, the diode according to the test method, to identify the three poles of two poles, it is measured, reverse resistance, resistance hour, multimeter black pen then the control electrode G, the red pen then the cathode K, and the remaining one is the anode A a. Testing SCR is good or bad: Ohm block R × 1, the black pen (+) attached to an anode A, the red pen (-) connected to the cathode K, while the control electrode G with black pen touch (the equivalent of adding a positive trigger voltage ) what, if remains on, the SCR is good. Note: King current SCR, there may not be triggered, starting a low resistance meter (available larger trigger current) measurements.