By Fleurette Nina. Motor Wiring. Publised at Thursday, September 21st 2017, 18:43:05 PM. Stepper motor performance is strongly dependent on the driver circuit. Torque curves may be extended to greater speeds if the stator poles can be reversed more quickly, the limiting factor being a combination of the winding inductance. To overcome the inductance and switch the windings quickly, one must increase the drive voltage. This leads further to the necessity of limiting the current that these high voltages may otherwise induce.
By Dorian Yannic. Car Wiring. Published at Thursday, December 28th 2017, 11:54:02 AM. Use insulating tape in a spiral to bind wires together. If you have to lead a new wire along a difficult route - to the rear of the car, for example - you could take the opportunity to lead a spare wire at the same time, for any accessory you might want to fit later. Cover the end of a spare wire with insulating tape to prevent an electrical short circuit. Identifying cable sizes 14/30 cable 65/30 cable High-tension (HT) lead The starter cable Types of cable.
By Claudine Nicolette. Electrical Wiring. Published at Thursday, December 28th 2017, 11:33:40 AM. Fixtures are more suited for the flexible circuit boards as well as the fragile and thin PCBs. However, each new board design requires its custom fixture which can take between three and four days for a manufacturer to produce and deliver. As such, using fixtures can add up the costs and time to produce the PCBs.
By Fleurette Nina. Car Wiring. Published at Thursday, December 28th 2017, 11:30:31 AM. Spade terminal The spade terminal is theusual way of fixing wires to components. Crimp or bullet connector The crimpconnector is used for joining single wires toeach other. It may be a single or doubleconnector, or a multi- connector carryingseveral wires.
By Cyrille Lothaire. Electrical Wiring. Published at Thursday, December 28th 2017, 10:45:09 AM. Note that U4, a 10 MHz MEMS oscillator, is also very close to the microcontroller’s clock input pin. It’s always a good idea to minimize the length of traces carrying high-frequency digital signals. First of all, there are noise benefits: a shorter, more direct trace reduces the amount of noise that would otherwise be coupled into adjacent traces, and a shorter trace also reduces electromagnetic interference (EMI) because it is less effective as an antenna. The second issue is related to transmission-line effects. Minimizing trace length is a simple way to avoid problems related to signal reflections. However, reflection is not a significant concern at frequencies in the 10 MHz range, unless you are dealing with long interconnections or a very large PCB.
By Olivier Constance. Car Wiring. Published at Thursday, December 28th 2017, 10:09:08 AM. If possible, use an insulated in-line crimp connector. Test each mended wire with a circuit tester and battery, connected to the nearest connectors either side of the mend. Re-wrap the exposed section of the loom with self-adhesive or "clingfilm" PVC insulating tape. Put some layers between the exposed section and adjoining wires - not merely a cover over the top - then fit the loom back into the car. Reconnect all terminals and clips, then test all the electrical components involved.
By Gaspard Magalie. Motor Wiring. Published at Thursday, December 28th 2017, 10:08:52 AM. What is commonly referred to as microstepping is often sine–cosine microstepping in which the winding current approximates a sinusoidal AC waveform. Sine–cosine microstepping is the most common form, but other waveforms can be used. Regardless of the waveform used, as the microsteps become smaller, motor operation becomes more smooth, thereby greatly reducing resonance in any parts the motor may be connected to, as well as the motor itself. Resolution will be limited by the mechanical stiction, backlash, and other sources of error between the motor and the end device. Gear reducers may be used to increase resolution of positioning.
By Olivier Constance. Electrical Wiring. Published at Thursday, December 28th 2017, 07:48:26 AM. When implementing a real-time system, we find a circular buffer critical whether we are using a DSP processor or a general purpose processor (GPP). However, with a GPP we may have to implement the circular buffer in software. As discussed in the previous section, with each new sample, we have to update the pointer which contains the address of the newest sample. With a circular buffer implemented in software, the programmer needs to take care of updating the buffer pointers after each read and write operation. When the pointer reaches the end of the buffer, the program must wrap the pointer back to the beginning of the buffer.
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