The earth setting for input pin of the power module will not impact the function of the module itself. Suspending the module can also operate normally. In certain cases, connecting the ground pin of the module to the ground or system ground can provide access to external interference and improve the anti-interference performance of the products. When connection to the ground or system ground is available, customers can perform ground connection according to the actual situation.
Yes. Some industrial standards are applicable to the test methods of switching power supply ripple & noise, and the parallel cable measuring method or contact measuring method is used. Specific tests can be referred to Diagrams 6-1 and 6-2.
Diagram 6-2 Oscilloscope connection (the left is correct while the right is inadvisable) and contact measuring method
36. The power source of dual output modules may produce high voltage. Why the ripple & noise is higher than that in individual tests of positive and Like (0)
The power source of dual output modules may produce high voltage, and the ripple & noise here come from both outputs. Add LC filter circuits to the output terminals of the modules to eliminate the interference between two outputs.
When the negative voltage is -48V, the ‘0V’ of the input voltage connects with the ‘Vin’ of the module, and the ‘-48V’ connects with ‘GND’ to ensure the potential difference at the input end. Under a negative input, the flow direction of the input current of the module must correspond with that of the positive input. It is recommended to connect a diode in series to avoid reverse connection.
34. The module fails to start up when the capacitive load is relatively large. How can this problem be solved? Like (0)
In practical application, the capacitive load exceeds the maximum capacitive load of operating module. In addition, when the output capacitance is extremely large, large starting current is required at the moment of startup, resulting in the failure of starting the module.
The crosstalk interference may occur when the switching power sources are supplied power in input-series connection, and especially when the power sources are in parallel connection. The generally adopted method is to add a filter circuit to the input and output terminals, a CM inductor and X capacitor at the input terminal, and a pi filter at the output terminal.
No. The unbalanced load will lead the output voltage of products to go beyond the precision range, resulting in failing to meet the power supply requirements of the customer system. Customers are recommended to ensure the load balance among the outputs (the load gap should be within +/-5%); measures can be taken to add a dummy load for the output with low load.
For voltage modules, some backlit LCDs in the market can be equivalent to greater capacitance load. As such, the requirements for current are high upon startup and overload occurs, resulting in the voltage drop.
NTC or resistors can be added to the back stage of the output to limit the current and avoid overload; alternatively, larger-power products can be selected to supply power to the backlit LCD.
30. The IGBT driver outputs low levels when the driving signal is supplied to the IGBT driver with the power. How can this be solved? Like (0)
When the supply voltage is insufficient due to abnormalities in the power supply system, and the driving voltage cannot meet the requirements for the saturation conduction of IGBT, the IGBT driver will be burnt out. To this end, MORNSUN’s IGBT driver is equipped with a under-voltage protection function which requires supplying power before giving signals. If the power and signals are supplied at the same time, the low level should be given first (the time is 2uS longer than the dead zone time), and then the high level is given to ensure the normal output of the driving signals.
Supply power before giving signals, or provide low level (the time is longer than the dead zone time) before giving driving signals.
29. The module is interfered in the use process, and the data acquisition signal is bouncing. How can it be solved? Like (0)
There is a demand for output ripple & noise when collecting data signals. It is recommended to select and use modules with Y isolated capacitor. Another solution is to add CM inductor to suppress high-frequency inference to the greatest extent;, or add an LC filter circuit at the output terminal to suppress circuit signal interference at the back end.
Application Change Coordinator is required for one of the leading investment management companies based in central London.
Working for a large well established financial company you will support application change and release, working with 3rd party vendors to test and implement.
This is an exceptional opportunity to join one of the leading investment management and financial planning firms that offer a unique opportunity to progress your career.
At Mortland Door Systems in Abington, providing our customers with outstanding service and the best products on the market is our commitment. This is why Garaga is the brand carried by us, and why a lot of emphasis is put on training our technicians. Our team has been in the industry for many years, and knows everything there is to know regarding the sale, installation and repair of garage doors and garage door openers. We can be trusted for all your garage door inquiries, we will be sure to fix your problems rapidly and accurately!
Because the pressure and weight of a garage door cause wear and tear, springs will eventually lose force or break. Because they play such a large role in moving the garage door up and down, they are often problematic and need to be taken care of or repaired often. Loose springs can quickly become both a safety and a functional hazard. The longevity of your garage door system is partly determined by the springs. If they are taken care of properly, they will yield an optimal number of cycles before replacement is needed. Whether your garage door is equipped with torsion (fixed at the header) or extension springs (fixed over horizontal tracks), both systems must be maintained and lubricated on a regular basis in order to perform consistently.
Another common problem with some older garage doors is misalignment in the cables, or the cables coming off from the pulleys. While this may seem like an insignificant issue, it should be taken seriously. Such a problem will keep your garage door from proper functioning, and the safety of your garage door system will be jeopardized. Cables and springs are not repairs that should be attempted to be done by you; in order to realign the springs or cables, the torsion bar must be loosened, which is a dangerous operation, especially for people who are not familiar with the mechanics of garage doors.
Lastly, if you have an electric garage door opener, don’t overlook it. Our experienced technicians are able to handle any problem that might arise, and can put everything back in top working order.
It is much safer to call Mortland Door Systems to handle all your garage door issues in the Abington area. By doing so, your door will certainly be in perfect working condition after our team leaves, all the safety features will have been tested, and peace of mind will be achieved! We are available to answer any questions, and do not hesitate to contact us for all your installation, repair and maintenance needs!