PESHAWAR: The Bus Speedy Transit service resumed right here on Saturday after remaining suspended for round 40 days resulting from hearth incidents in some buses.
The event got here after the Chinese language bus producer rectified the reason for hearth.
A press release issued by the TransPeshawar, the government-owned firm set as much as handle bus operations, stated the service was launched on Saturday morning and would proceed from 6am to 10pm.
It stated it had additionally launched categorical bus service, which might start from Chamkani and make stops at Sardar Ghari, Lahori Adda, Hashtnagri, Malik Saad, Khyber Bazaar, Dabgari Backyard, Saddar Bazaar, Peshawar College, Mall of Hayatabad and Karkhano Market.
Additionally, there might be a particular route from Khyber Bazaar to Mall of Hayatabad. Three Hayatabad feeder routes will change into operational right this moment (Sunday).
Chinese language firm rectifies reason behind current hearth in buses
The BRT bus service was launched on Aug 13 by Prime Minister Imran Khan. Nevertheless, it was suspended on Sept 16 within the wake of 4 hearth incidents in buses.
A staff of engineers from the Chinese language bus producer reached Peshawar to determine and rectify the problems inflicting hearth.
The corporate submitted a report back to the TransPeshawar attributed hearth incidents to the malfunctioning of a motor controller put in between hybrid batteries and electrical motor.
It stated the motor management unit of buses ‘acted because the core of the hybrid programs, and transformed direct present from battery to the alternating present to drive the motor by the sophisticated management of variable parameters to regulate the parameters to regulate the ability efficiency of electrical motor and bus’.
The corporate stated the MUC was managed by a programme, which was developed in line with the enter of exterior situations.
It stated as buses began, that system labored in such a fashion that batteries gave power by way of motor controller to motors to drive the buses initially from idle place or re-circle the power by changing the kinetic power to present and charging again to the batteries in deceleration.
“Throughout this path, the DC-AC changing of present flows generates the ripple present within the MCU and within the circuit. Underneath the traditional situations, the ripple present could be absorbed by the batteries or they’re smoothed by way of capacitors in motor controller.”
The corporate stated as a result of sudden irregular exterior situations, which included a number of parameters, elevated the ripple present as much as the utmost 750A stopping the MCU capacitors from smoothing the ripple present because it was past their capability.
“The failure of capacitors instantly led to the violent warmth up and malfunction and even explosion, which consequently led to quick circuit of excessive volt energy circuit and thus resulting in the eruption of fireside on the autos.”
Within the report, the corporate famous that the height present was presupposed to be restrained by software program improve to restrict the circulate of the present from the motor controller change.
It, nevertheless, identified that sure digital parts within the MCU of buses have been checked to have been broken by the irregular present earlier than the software program updating that precipitated the fireplace incidents.
The corporate stated it had developed an answer for the issue, together with redesign and substitute of bus motor controllers.
It additionally stated it will change motor controllers in 18 meters mannequin buses for higher temperature resistance efficiency.
The corporate’s resolution additionally included the altering of the insulated gate bipolar transistor within the motor controller, which can reserve the bigger energy capability and enhance the efficiency of the temperature resistance and present changing effectivity.
As well as, the temperature sensors might be put in in motor controller to report and supply warning for any irregular temperature within the unit.
The corporate stated the only motor controller in 12 meters lengthy buses could be modified to the twin one.
It additionally assured the authorities that it stood by its commitments talked about within the contract and would proceed providing full help and cooperation for the sleek operating of the bus service.
Printed in Daybreak, October 25th, 2020