Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Ground (electricity) wikipedia , lookup
Embedded system wikipedia , lookup
Voltage optimisation wikipedia , lookup
Opto-isolator wikipedia , lookup
Stray voltage wikipedia , lookup
Alternating current wikipedia , lookup
History of electric power transmission wikipedia , lookup
Electric vehicle conversion wikipedia , lookup
Public address system wikipedia , lookup
Mains electricity wikipedia , lookup
PowerPoint® Presentation Chapter 3 High-Voltage Vehicle Safety Systems High-Voltage Safety Systems • Interlock Systems • Service Disconnect Services • Isolation Fault Detection Systems Chapter 3 — High-Voltage Vehicle Safety Systems The J1673 standard provides a visual means of identifying high-voltage wires and cables. Chapter 3 — High-Voltage Vehicle Safety Systems A serial interlock loop (SIL) connects each high-voltage device in series. Chapter 3 — High-Voltage Vehicle Safety Systems Each wire that carries high voltage has a serial interlock loop circuit that reports the status to the batterypack controller. Chapter 3 — High-Voltage Vehicle Safety Systems A local interlock loop (LIP) connects each high-voltage device on a LAN bus. Chapter 3 — High-Voltage Vehicle Safety Systems A grounded switch interlock is a modified LIP system with switches located within its components. Chapter 3 — High-Voltage Vehicle Safety Systems An active bus-discharge circuit is typically located within the power inverter. Chapter 3 — High-Voltage Vehicle Safety Systems The op-amp output voltage in the saturated state is equal to the supply positive voltage. The op-amp output voltage in the low state is approximately equal to the voltage on the op-amp ground. Chapter 3 — High-Voltage Vehicle Safety Systems A window comparator permits the op-amps to sense whether a voltage input is within a specific voltage window. Chapter 3 — High-Voltage Vehicle Safety Systems A high-voltage cutoff switch and an inertia fuel shutoff switch work with the interlock circuit and open in the event of a collision. Chapter 3 — High-Voltage Vehicle Safety Systems The service disconnect system permits a technician to manually isolate the battery-pack system from other vehicle systems. Chapter 3 — High-Voltage Vehicle Safety Systems An isolation-fault detection system monitors the vehicle chassis ground to determine if high voltage is acquiring an electrical path to the chassis. Chapter 3 — High-Voltage Vehicle Safety Systems DC isolation fault detection measures DC leakage to chassis ground. Chapter 3 — High-Voltage Vehicle Safety Systems AC isolation fault detection injects an AC signal onto the bus. Chapter 3 — High-Voltage Vehicle Safety Systems The voltage-sensing stage monitors the voltage on both the analog and chassis grounds. Chapter 3 — High-Voltage Vehicle Safety Systems The differential-amplifier stage amplifies the difference between its inverting and noninverting inputs. Chapter 3 — High-Voltage Vehicle Safety Systems The voltage-comparator stage senses voltages and compares those voltages to a voltage reference value. Chapter 3 — High-Voltage Vehicle Safety Systems The controller uses logic to determine whether a voltage level is within a safe range. Chapter 3 — High-Voltage Vehicle Safety Systems A simple voltage-regulator circuit can be constructed with zener diodes, resistors, and capacitors in parallel and one resistor in series.