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![]() The internal representation base is always as whole number 1.3 INPUT LOGIC FUNCTIONS (I) The input logic functions are 32 commands that come from configured terminal board logic inputs, from the serial line, and from the fieldbus. The speed and current reference values are generated by the application. As an absolute position value is not required for the sensors (managed with an optional internal electronic board) incremental TTL Encoders and incremental SinCos Encoders may be used. At this point all speed reference are ignored, instead a fixed speed reference is calculated equals to maximum test torque (P130) divided by speed regulator proportional gain. Once the test has started the motor will rotate in the positive direction at low speed and all Encoder edges are counted. Once the test has started the motor will rotate in the positive direction at low speed and some measure are done on Resolver signals. If A15 code3 is enabled, the values set do not comply with the motor pole and sensor settings. At the end of the test, check parameter P79 as it may give some indication as to the problem. If the tests cannot be carried out for any reason, these values will have to estimated by reading the motor plate and following these points. Arch enemy the root of all evil rarOnce C42 0 has been set again, if C750 the default values of the parameters being tested will be automatically reloaded, on the contrary if C751 remain active actual data. Note that it is a torque control and not a current control, consequently during flux weakening the control automatically generates the request for the active current needed to obtain the required torque. Parameters P21, P22, P23 and P24 can be used to establish independent acceleration and deceleration slopes in both directions of movement, establishing the time required to pass from 0 to 100 in seconds. The use or otherwise of the exclusion bands requires the setting of the corresponding connection C38: Band 1 (P179-P180) C810 (Default) not excluded, C811 excluded Band 2 (P181-P182) C81. The other, sysSpeedRefPulses is electrical pulses for a period of PWM. This particular reference is used so as not to be lose any pulses if the frequency input is used. The effects of the 2nd order filter will be better than the 1st order filter only when the frequency is double that of the 2nd order filter. Its useful to set some milliseconds of filter (P168) on order to avoid too much noise on torque reference for the time derivative. The graph below illustrates the progress of a torque curve according to speed with the motor powered by a constant frequency (Ns). Thus the motor has three working areas: Constant torque: the maximum torque is available up to the rated speed (as long as the current to deliver it is available). ![]() They can only be changed by accessing TDE MACNO reserved parameter P127 Multiplication coefficient Kp and Ta flux loop The voltageflux regulator limit is normally set at rated motor current so that the total flux may be changed quickly during the transient state. The only chance its to wait the time needed for the magnetic flux to reduce itself with its time constant that depend on the motor type and can vary from few milliseconds to hundreds of milliseconds. Setting C340 the drive, even if the mains supply voltage is no longer available, continues to work as though nothing has been modified over the control, pulling the energy from the present capacitor to the inner drive.
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