By Cyrielle Marjolaine. Motor. Publised at Thursday, June 08th 2017, 14:32:37 PM. What comes with the increased motor power with increased power supply voltage is increased motor heating; this heating increases more rapidly than output power and ultimately sets the maximum output power from the motor. That is to say, the limiting factor in how much power a motor can deliver is ultimately determined by how much heat it can safely dissipate.
By Bertille Solange. Diagram. Published at Tuesday, December 19th 2017, 02:14:46 AM. A block diagram shows a higher level (or organizational layout) of functional units in a circuit (or a device, machine, or collection of these). It is meant to show data flow or organization between separate units of function. A block diagram gives you an overview of the interconnected nature of circuit assemblies or components.
By Jessica Mireille. Circuit. Published at Tuesday, December 19th 2017, 02:08:03 AM. Electric current is the rate at which electric charge flows through a given area. Current is measured in the unit of Coulombs per second, which is known as an ampere (A). In an electronic circuit, the electromagnetic problem of currents is typically simplified as a current flowing through particular circuit components.
By Sasha Sara. Amplifier. Published at Tuesday, December 19th 2017, 02:01:05 AM. As I mentioned earlier there is a third "ground" the case or chassis. Here there can be two distinct issues. As part of many electrical codes all exposed metal parts of AC mains electrically powered equipment must be either connected to the "earth" ground or doubly insulated from any electrical connections. This is to protect the user in case there is an internal failure. Any potentially dangerous voltages will be "grounded" to the earth. So I use three wire connections all the time. The "earth" ground from the AC mains is directly connected to the chassis at the entry point. As a note of interest I also use the standard IEC connectors that are found on nearly all personal computers to connect to the AC mains. This makes it easy to move equipment around and you do not have the AC cord permanently affixed to the equipment. In addition to protecting the user from shock hazards, the case now acts as an EMI shield. Any external EMI is diverted to the earth ground via the power cord.
By Madeleine Catherine. Diagram. Published at Tuesday, December 19th 2017, 01:28:27 AM. On all but the simplest PCBs, wires must be printed on more than one surface of fiberglass to allow for all the required component interconnections. Each surface containing printed wires is called a layer. In a relatively simple PCB that requires only two layers, only one piece of fiberglass is required since wires can be printed on both sides. In a more complex PCB where several layers are required, individual circuit boards are manufactured separately and then laminated together to form one multi-layer circuit board. To connect wires on two or more layers, small holes called vias are drilled through the wires and fiberglass board at the point where the wires on the different layers cross. The interior surface of these holes is coated with metal so that electric current can flow through the vias. Most Digilent boards are simple four or six layer boards; some more complex computer circuit boards have more than 20 layers.
By Madeleine Catherine. Diode. Published at Tuesday, December 19th 2017, 01:03:57 AM. Diodes are made from semiconductor materials, mainly silicon, with various compounds (combinations of more than one element) and metals added depending on the function of the diode. Early types of semiconductor diodes were made from Selenium and Germanium, but these diode types have been almost totally replaced by more modern silicon designs.
By Jessica Mireille. Motor. Published at Tuesday, December 19th 2017, 00:50:09 AM. A real step motor has losses that modify the ideal speed-torque curve. The most important effect is the contribution of detent torque. Detent torque is usually specified in the motor datasheet. It is always a loss when the motor is turning and the power consumed to overcome it is proportional to speed. In other words, the faster the motor turns the greater the detent torque contributes power loss at the motor’s output shaft. This power loss is proportional to speed and must be subtracted from the ideal, flat output power curve past the corner speed. This now constitutes a practical speed-torque curve.
By Jessica Mireille. Diagram. Published at Tuesday, December 19th 2017, 00:43:41 AM. An electronic circuit is a circular path of conductors by which electric current can flow. A closed circuit is like a circle because it starts and ends at the same point forming a complete loop. Furthermore, a closed circuit allows electricity to flow from the (+) power to the (-) ground uninterrupted.
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