Saving value in database having type time using doctrine 2 orm

Question

I'm trying to save data using ZF2 Doctrine ORM Module using dynamic paramter as entity class name and initializing its object and saving data using dynamic values from excel sheet header,

$time = \PHPExcel_Style_NumberFormat::toFormattedString($rowData[0][$key], 'hh:mm:ss');
$obj->$setter(\DateInterval::createFromDateString($this->secondsToTime(strtotime($time))));
$this->orm->persist($obj);
$this->orm->flush();

$this->secondsToTime(strtotime($time)) is returning time in format 4 hours 5 minutes 6 seconds

Field type is time, when I print $obj->getter(), it prints:

DateInterval Object
(
    [y] => 0
    [m] => 0
    [d] => 0
    [h] => 4
    [i] => 5
    [s] => 6
    [weekday] => 0
    [weekday_behavior] => 0
    [first_last_day_of] => 0
    [invert] => 0
    [days] => 
    [special_type] => 0
    [special_amount] => 0
    [have_weekday_relative] => 0
    [have_special_relative] => 0
)

But it doesn't save its value as 4:05:06 in database, it saves 00:00:00. I tried answer from here