1 MENTOR II features (1) power phase sequence. The phase loss is automatically detected and the drive operation is independent of the phase sequence. (2) Output. The six-pulse trigger output thyristor can be configured in twelve-pulse (series) operation. (3) Speed ​​feedback. Motor armature voltage. Speed ​​measuring motor. Encoder (pulse tachometer). (4) Speed ​​is given. - 10 V + 10 V, or 0- 10 V.4- 20 mA, or 0- 10 V.20 - 4 mA, 0- 10 V. 0- 20 mA, or 0- 10 V.20- 0 mA, or 0- 10 V. (5) Current feedback. Accuracy 0.1%. Current loop linearity 2%, response speed 80HZ. The response is consistent in the full current range. (6) Control. The user can configure all analog inputs and large digital inputs. (7) PID speed loop algorithm. The encoder input implements position control. The speed range of the tachometer is allowed to be on the main board. Field weakening control is available using the excitation control unit. Phase sequence and phase loss detection. The software implements a current adaptive algorithm. Optional remote operation monitoring unit. (8) Menu driven parameter structure. The drive returns to the most recently modified parameters for each menu. Quick access to the most frequently used parameters is available through user-defined menus. (9) Encoder digital input or internally generated digital reference. 2 DC speed control principle Single-phase power supply to a thyristor full control bridge, the current generated in the resistive load is intermittent. When the thyristor is triggered, there is current, and when the power supply voltage crosses zero every half cycle, the current disappears. The rectifier bridge gets the maximum voltage output when the firing angle is fully pushed forward. The current decreases when the firing angle is shifted back. When the load is inductive, such as a motor, or the firing angle is fully advanced, the current becomes continuous. The current fundamental lags behind the voltage, in part because of the inductive nature of the load, and partly because of the firing angle delay. Reverse: There are two ways to reverse the motor, depending on the configuration of the drive rectifier bridge. The simplest three-phase full-control bridge has no ability to output polarity inversion. This type is called single quadrant or single phase. To reverse the motor terminals must be switched externally. For some applications, this simple method of use is sufficient. However, for those who require full control of the motor in both directions ( In applications where the torque direction can be changed quickly and frequently, a dual-bridge anti-parallel system must be used. This configuration does not require a reverse contactor and provides full control of the motor's forward and reverse and forward and reverse braking, known as 4-quadrant or reversible drives. If the unidirectional drive requires braking, an additional circuit must be applied. 3 Control Regardless of whether the driver is single-quadrant or 4-quadrant, the motor response is basically a function of the output voltage. The output voltage is determined by the firing angle of the thyristor bridge, and the firing angle can be precisely controlled. The quality of the motor response depends on the ability of the drive logic to receive, interpret, and process all of the data associated with the current state of the motor and its required state. Some of these data come from external sources such as speed reference, torque reference, speed feedback, etc., some from the drive logic itself, such as output voltage and current, and the conditions required by the logic system at different stages. The logic system requires a series of instructions to enable him to complete the entire process of access, processing, and departure control signals. The instructions are provided in the form of data, which is broken down into individual values, ie parameters, depending on the specific operational requirements of the motor application. In a given industrial application, the characteristics of the drive are determined by user set parameters and internal monitoring parameters. For the above reasons, the MENTOR II driver consists of a microprocessor and software configured by user-set parameters. The parameters contain all the important factors related to the performance of the motor, so the user can accurately meet the requirements of the specific application by setting the drive. The parameters can further provide communication, privacy and other functions. 4 Conclusions This transformation has proved through the actual operation that the all-digital DC motor drive uses a stable performance failure rate. Long service life, compared with the original V5 DC motor drive has unparalleled advantages. (Finish) European Ignition Coil ,Honda Fit Ignition Coil,Holden Cruze Ignition Coil,Chevy Cruze Coil RuiAn HongSheng Auto Electric Co.,Ltd , https://www.hongshengignitioncoil.com
Optimization and improvement of machine tool drive equipment