current and current rate of increase is too large

2) equipment checks obtained according to the symptoms of the preliminary conclusions and questions, the equipment for a more detailed examination,[link widoczny dla zalogowanych], especially those considered most likely faulty area. To note at this stage should avoid the unnecessary demolition of the equipment to do, and should prevent the rise to more failures.
3) to determine failure location of the maintenance staff must have complete control of system control theory and structure. If the lack of system diagnostic information needs of maintenance personnel to correct equipment or control the whole system is divided into several functional blocks,[link widoczny dla zalogowanych], and then check the function block input and output are normal.
4) line inspection and replacement, repair of these two steps are closely related, line inspection and fault location can be used similar methods to determine, first identify the faulty component or components can be replaced, and then effective repair.
A: This is the speed with P controller loop speed control system. Sudden such a system given a step speed Up (for the system boot), because of the larger system of mechanical inertia, motor speed can not be immediately established, which started early in the negative feedback signal Un = 0. At this point increase the input in the regulation of the speed error signal ΔUn = Up, which is almost the time of its steady state (1 + K) times. As the proportion of regulators and the inertia of thyristor devices smaller, so the UGT values increased rapidly, forcing the rectified voltage Ud immediately reach full pressure. This DC motor, the equivalent of full-pressure direct start,[link widoczny dla zalogowanych], the starting current of up to several times the rated current, so the system will be immediately over-current protection relay action, the system tripping. In other words,[link widoczny dla zalogowanych], this system will be the trip of a transmission, the motor did not start. In addition, current and current rate of increase is too large, the DC motor commutator and the safety of SCR is also not allowed. Thus, in the speed closed-loop speed control system must limit the current to start the motor, brake and stall when the overload current does not exceed its allowable value.
2. What are the steps generally include mapping? A: The first step: mapping out the machine wiring diagram. Including numerical control system, servo system and the machine, the external part of the installation of electrical wiring diagram. Step Two: Mapping the electrical control schematics. Including CNC system and servo systems,[link widoczny dla zalogowanych], machine control circuit between the high power electrical control schematics. The third step: organize sketches. Further examination to verify, standardize the painted sketches, mapping out the ZK7132 Vertical CNC milling machine complete wiring diagram and electrical control schematics.
A: Electrical and mechanical integration of the traditional microelectronics industry is formed by the process of gradually penetrate a new concept,[link widoczny dla zalogowanych], it is the micro-electronics technology, mechanical technology mingled with the product, is set for the integration of multiple technologies a new cross-disciplinary.
A: Mechatronics is a multidisciplinary field of technology-intensive integrated cross-system engineering. It includes mechanics,[link widoczny dla zalogowanych], computer and information processing technology, system technology, automatic control technology, sensor and detection technology, servo drive technology.
A: The computer is a tool to achieve information processing. In mechatronics systems, computer and information processing part of the control of the whole system, directly affects the system efficiency and quality.
A:: transformer inverter work, in the event of commutation failure, an external DC power supply will be formed through the thyristor short circuit, or the average voltage output of bridge rectifier and DC power into forward series, the internal resistance of the inverter circuit is very small, forming a large short-circuit current, a condition called inverter subversion.
(1) linear structure. This type of structural system with a sub-out method is particularly suitable for fault diagnosis. Maintenance personnel in the approximate middle of the system to select a test point, for example, point A figure, by checking to determine the fault is in front of or behind this point.
(2) diffusion-type structure. The following methods can be used for this type of structural system for fault diagnosis.
reasoning analysis. If the four output function block has three working properly, only one is not normal, can be inferred fault that does not work in this block. If the four output blocks are not normal, then the fault in the function block F1 in the most likely.
(3) convergence structure. It acts as a \A and B-convergence of the structure of the same diagnosis,[link widoczny dla zalogowanych], but the maintenance staff must be aware that under certain conditions, function block F1-F3 in which output should be valid. Control systems for complex devices, very few meet any of the foregoing structure, their structure is very complex and quite sophisticated feedback and markers.

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